What Is Sensory Integration?
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
How Does the Balance System Work?
How Does the Balance System Work? Author: Shannon L.G. Hoffman, PT, DPt Sara MacDowell PT, DPT Fact Sheet Many systems work together to help you keep your balance. The goal is to keep your body and vision stable Peripheral Sensory Systems: 1) Vision: Your vision helps you see where your head and body are in rela- tion to the world around you. 2) Somatosensory/Proprioception: We use the feeling from our feet against the ground as well as special sensors in our joints to know where our feet and legs are positioned. It also tells how your head is oriented to your neck and shoulders. Produced by 3) Vestibular system: Balance organs in the inner ear tell the brain about the movements and position of your head. There are 3 canals in each ear that sense when you move your head and help keep your vision clear. Central Processing: Information from these 3 systems is sent to the brain for processing. The brain stem also gets information from other parts of the brain called the cerebellum and cerebral cortex, mostly about past experiences that have A Special Interest affected your sense of balance. Your brain can control balance by using Group of the information that is most important for a certain situation. For example, in the dark, when you can’t use your vision, your brain will use more information from your legs and feet and your inner ear. If you are walking on a sandy beach during the day, you can’t trust your feet on the ground and your brain will use your eyes and inner ear more. -
Chemoreception
Senses 5 SENSES live version • discussion • edit lesson • comment • report an error enses are the physiological methods of perception. The senses and their operation, classification, Sand theory are overlapping topics studied by a variety of fields. Sense is a faculty by which outside stimuli are perceived. We experience reality through our senses. A sense is a faculty by which outside stimuli are perceived. Many neurologists disagree about how many senses there actually are due to a broad interpretation of the definition of a sense. Our senses are split into two different groups. Our Exteroceptors detect stimulation from the outsides of our body. For example smell,taste,and equilibrium. The Interoceptors receive stimulation from the inside of our bodies. For instance, blood pressure dropping, changes in the gluclose and Ph levels. Children are generally taught that there are five senses (sight, hearing, touch, smell, taste). However, it is generally agreed that there are at least seven different senses in humans, and a minimum of two more observed in other organisms. Sense can also differ from one person to the next. Take taste for an example, what may taste great to me will taste awful to someone else. This all has to do with how our brains interpret the stimuli that is given. Chemoreception The senses of Gustation (taste) and Olfaction (smell) fall under the category of Chemoreception. Specialized cells act as receptors for certain chemical compounds. As these compounds react with the receptors, an impulse is sent to the brain and is registered as a certain taste or smell. Gustation and Olfaction are chemical senses because the receptors they contain are sensitive to the molecules in the food we eat, along with the air we breath. -
Electromagnetic Field and TGF-Β Enhance the Compensatory
www.nature.com/scientificreports OPEN Electromagnetic feld and TGF‑β enhance the compensatory plasticity after sensory nerve injury in cockroach Periplaneta americana Milena Jankowska1, Angelika Klimek1, Chiara Valsecchi2, Maria Stankiewicz1, Joanna Wyszkowska1* & Justyna Rogalska1 Recovery of function after sensory nerves injury involves compensatory plasticity, which can be observed in invertebrates. The aim of the study was the evaluation of compensatory plasticity in the cockroach (Periplaneta americana) nervous system after the sensory nerve injury and assessment of the efect of electromagnetic feld exposure (EMF, 50 Hz, 7 mT) and TGF‑β on this process. The bioelectrical activities of nerves (pre‑and post‑synaptic parts of the sensory path) were recorded under wind stimulation of the cerci before and after right cercus ablation and in insects exposed to EMF and treated with TGF‑β. Ablation of the right cercus caused an increase of activity of the left presynaptic part of the sensory path. Exposure to EMF and TGF‑β induced an increase of activity in both parts of the sensory path. This suggests strengthening efects of EMF and TGF‑β on the insect ability to recognize stimuli after one cercus ablation. Data from locomotor tests proved electrophysiological results. The takeover of the function of one cercus by the second one proves the existence of compensatory plasticity in the cockroach escape system, which makes it a good model for studying compensatory plasticity. We recommend further research on EMF as a useful factor in neurorehabilitation. Injuries in the nervous system caused by acute trauma, neurodegenerative diseases or even old age are hard to reverse and represent an enormous challenge for modern medicine. -
Auditory System & Hearing
Auditory System & Hearing Chapters 9 part II Lecture 17 Jonathan Pillow Sensation & Perception (PSY 345 / NEU 325) Fall 2017 1 Cochlea: physical device tuned to frequency! • place code: tuning of different parts of the cochlea to different frequencies 2 The auditory nerve (AN): fibers stimulated by inner hair cells • Frequency selectivity: Clearest when sounds are very faint 3 Threshold tuning curves for 6 neurons (threshold = lowest intensity that will give rise to a response) Characteristic frequency - frequency to which the neuron is most sensitive threshold(dB) frequency (kHz) 4 Information flow in the auditory pathway • Cochlear nucleus: first brain stem nucleus at which afferent auditory nerve fibers synapse • Superior olive: brainstem region thalamus MGN in the auditory pathway where inputs from both ears converge • Inferior colliculus: midbrain nucleus in the auditory pathway • Medial geniculate nucleus (MGN): part of the thalamus that relays auditory signals to the cortex 5 • Primary auditory cortex (A1): First cortical area for processing audition (in temporal lobe) • Belt & Parabelt areas: areas beyond A1, where neurons respond to more complex characteristics of sounds 6 Basic Structure of the Mammalian Auditory System Comparing overall structure of auditory and visual systems: • Auditory system: Large proportion of processing before A1 • Visual system: Large proportion of processing after V1 7 Basic Structure of the Mammalian Auditory System Tonotopic organization: neurons organized spatially in order of preferred frequency • -
Sensory Change Following Motor Learning
A. M. Green, C. E. Chapman, J. F. Kalaska and F. Lepore (Eds.) Progress in Brain Research, Vol. 191 ISSN: 0079-6123 Copyright Ó 2011 Elsevier B.V. All rights reserved. CHAPTER 2 Sensory change following motor learning { k { { Andrew A. G. Mattar , Sazzad M. Nasir , Mohammad Darainy , and { } David J. Ostry , ,* { Department of Psychology, McGill University, Montréal, Québec, Canada { Shahed University, Tehran, Iran } Haskins Laboratories, New Haven, Connecticut, USA k The Roxelyn and Richard Pepper Department of Communication Sciences and Disorders, Northwestern University, Evanston, Illinois, USA Abstract: Here we describe two studies linking perceptual change with motor learning. In the first, we document persistent changes in somatosensory perception that occur following force field learning. Subjects learned to control a robotic device that applied forces to the hand during arm movements. This led to a change in the sensed position of the limb that lasted at least 24 h. Control experiments revealed that the sensory change depended on motor learning. In the second study, we describe changes in the perception of speech sounds that occur following speech motor learning. Subjects adapted control of speech movements to compensate for loads applied to the jaw by a robot. Perception of speech sounds was measured before and after motor learning. Adapted subjects showed a consistent shift in perception. In contrast, no consistent shift was seen in control subjects and subjects that did not adapt to the load. These studies suggest that motor learning changes both sensory and motor function. Keywords: motor learning; sensory plasticity; arm movements; proprioception; speech motor control; auditory perception. Introduction the human motor system and, likewise, to skill acquisition in the adult nervous system. -
Equilibrioception: a Method to Evaluate the Sense of Balance
Equilibrioception: A Method To Evaluate The Sense Of Balance Matteo Cardaioli when perturbations occur. This ability to monitor and GFT maintain balance can be considered as a physiological Padova, Italy sense, so, as for the other senses, it is fair to assume [email protected] that healthy people can perceive and evaluate Marina Scattolin differences between balance states. The aim of this Department of General Psycology study is to investigate how changes in stabilometric Padova, Italy parametres are perceived by young, healthy adults. [email protected] Participants were asked to stand still on a Wii Balance Patrizia Bisiacchi Board (WBB) with feet in a constrained position; 13 Department of General Psycology trials of 30 s each were performed by each subject, the Padova, Italy order of Eyes Open (EO) and Eyes Closed (EC) trials [email protected] being semi-randomized. At the end of each trial (except the first one), participants were asked to judge if their performance was better or worse than the one in the immediately preceding trial. SwayPath ratio data were used to calculate the Just Noticeable Difference (JND) between two consecutive trials, which was of 0.2 when participants improved their performance from one trial Abstract to the next, and of 0.4 when performance on a trial was In this study, we present an algorithm for the worse than in the previous one. This “need” of a bigger assessment of one’s own perception of balance difference for the worsening to be perceived seems to (equilibrioception). Upright standing position is suggest a tendency towards overestimation of one’s maintained by continuous updating and integration of own balance. -
Audiology and Hearing Aid Services
For more information, call the Hearing Aid Services office nearest you: Comprehensive hearing aid related services Barbourville Bowling Green are available to children diagnosed with (800) 348-4279 (800) 843-5877 permanent childhood hearing loss (PCHL). (606) 546-5109 (270) 746-7816 Elizabethtown Hazard Who should be referred to the OCSHCN (800) 995-6982 (800) 378-3357 Hearing Aid Services program? (270) 766-5370 (606) 435-6167 Children who are in need of new or Lexington Louisville replacement hearing aids and want to (800) 817-3874 (800) 232-1160 receive hearing aids and related services (859) 252-3170 (502) 429-4430 through a OCSHCN audiologist and wish to Morehead Owensboro receive Otology care outside of the (800) 928-3049 (877) 687-7038 clinical Otology program. (606) 783-8610 (270) 687-7038 What audiology services are available Paducah Prestonsburg (800) 443-3651 (800) 594-7058 through the OCSHCN Hearing Aid Services (270) 443-3651 (606) 889-1761 program? Licensed, certified audiologists conduct Somerset (800) 525-4279 periodic comprehensive hearing evaluations, (606) 677-4120 hearing aid checks, hearing aid repairs and Audiology and hearing aid evaluations according to ASHA best practices guidelines. Comprehensive Kentucky Cabinet for Health and Family Services Hearing Aid Services Office for Children with Special Health Care Needs reports are provided to the managing 310 Whittington Parkway, Suite 200, Louisville, KY 40222 otolaryngologist on an on-going basis; Phone: (502) 429-4430 or (800) 232-1160 FAX: (502) 429-4489 additional follow up testing will be http://chfs.ky.gov/agencies/ccshcn Information for Parents and Equal Opportunity Employer M/D/F completed at physician request. -
Understanding Balance in Nf2
UNDERSTANDING BALANCE IN NF2 Our balance is maintained through the interaction of the visual, vestibular and sensory systems. These systems function individually and in combination with each other. We can experience imbalance if there is a disturbance of any one of these systems. The visual (sight) system makes us aware of our surroundings and the position of our bodies in relation to our surroundings. The vestibular system lies in the inner ear and detects the movement produced when we engage in actions such as stopping, bending or turning. The sensory system keeps track of movement and tension in our muscles, tendons and joints as well as of the position of our body in relation to the ground. When signals are received from these systems the brain processes all the information and produces a sensation of stability. In order to have a good sense of balance we need to be able to see where we are and be aware of the position of certain parts of our bodies in relation to the things around us. Balance is a learnt process. If one or more of our balance systems does not work very well then the body is very good at compensating for this. A crucial aspect of the efficiency of the balance system is that our brains can control balance by using the information that is best suited at any one point in time. For example: when information conveyed by our eyes is reduced or unreliable, such as when in darkness, our brains will use more information from our lower limbs and inner ear. -
Anatomy of the Ear ANATOMY & Glossary of Terms
Anatomy of the Ear ANATOMY & Glossary of Terms By Vestibular Disorders Association HEARING & ANATOMY BALANCE The human inner ear contains two divisions: the hearing (auditory) The human ear contains component—the cochlea, and a balance (vestibular) component—the two components: auditory peripheral vestibular system. Peripheral in this context refers to (cochlea) & balance a system that is outside of the central nervous system (brain and (vestibular). brainstem). The peripheral vestibular system sends information to the brain and brainstem. The vestibular system in each ear consists of a complex series of passageways and chambers within the bony skull. Within these ARTICLE passageways are tubes (semicircular canals), and sacs (a utricle and saccule), filled with a fluid called endolymph. Around the outside of the tubes and sacs is a different fluid called perilymph. Both of these fluids are of precise chemical compositions, and they are different. The mechanism that regulates the amount and composition of these fluids is 04 important to the proper functioning of the inner ear. Each of the semicircular canals is located in a different spatial plane. They are located at right angles to each other and to those in the ear on the opposite side of the head. At the base of each canal is a swelling DID THIS ARTICLE (ampulla) and within each ampulla is a sensory receptor (cupula). HELP YOU? MOVEMENT AND BALANCE SUPPORT VEDA @ VESTIBULAR.ORG With head movement in the plane or angle in which a canal is positioned, the endo-lymphatic fluid within that canal, because of inertia, lags behind. When this fluid lags behind, the sensory receptor within the canal is bent. -
Sensory Overamplification in Layer 5 Auditory Corticofugal Projection Neurons Following Cochlear Nerve Synaptic Damage
Corrected: Publisher correction ARTICLE DOI: 10.1038/s41467-018-04852-y OPEN Sensory overamplification in layer 5 auditory corticofugal projection neurons following cochlear nerve synaptic damage Meenakshi M. Asokan1,2, Ross S. Williamson1,3, Kenneth E. Hancock1,3 & Daniel B. Polley1,2,3 Layer 5 (L5) cortical projection neurons innervate far-ranging brain areas to coordinate integrative sensory processing and adaptive behaviors. Here, we characterize a plasticity in 1234567890():,; L5 auditory cortex (ACtx) neurons that innervate the inferior colliculus (IC), thalamus, lateral amygdala and striatum. We track daily changes in sound processing using chronic widefield calcium imaging of L5 axon terminals on the dorsal cap of the IC in awake, adult mice. Sound level growth functions at the level of the auditory nerve and corticocollicular axon terminals are both strongly depressed hours after noise-induced damage of cochlear afferent synapses. Corticocollicular response gain rebounded above baseline levels by the following day and remained elevated for several weeks despite a persistent reduction in auditory nerve input. Sustained potentiation of excitatory ACtx projection neurons that innervate multiple limbic and subcortical auditory centers may underlie hyperexcitability and aberrant functional coupling of distributed brain networks in tinnitus and hyperacusis. 1 Eaton-Peabody Laboratories, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, USA. 2 Division of Medical Sciences, Harvard University, Boston, MA 02114, USA. 3 Department of Otolaryngology, Harvard Medical School, Boston, MA 02114, USA. Correspondence and requests for materials should be addressed to M.M.A. (email: [email protected]) NATURE COMMUNICATIONS | (2018) 9:2468 | DOI: 10.1038/s41467-018-04852-y | www.nature.com/naturecommunications 1 ARTICLE NATURE COMMUNICATIONS | DOI: 10.1038/s41467-018-04852-y he auditory system employs a variety of gain control to the IC and striatum33 or both to the IC and brainstem34). -
The Human Balance System: a Complex Coordination Of
The Human Balance ANATOMY System: A Complex Coordination of Central and Peripheral Systems By Vestibular Disorders Association, with contributions by Mary Ann BALANCE Watson, MA, F. Owen Black, MD, FACS, and Matthew Crowson, MD To maintain balance we use input from our vision Good balance is often taken for granted. Most people don’t find it difficult (eyes), proprioception to walk across a gravel driveway, transition from walking on a sidewalk (muscles/joints), to grass, or get out of bed in the middle of the night without stumbling. and vestibular system However, with impaired balance such activities can be extremely fatiguing (inner ear). and sometimes dangerous. Symptoms that accompany the unsteadiness can include dizziness, vertigo, hearing and vision problems, and difficulty with concentration and memory. ARTICLE WHAT IS BALANCE? Balance is the ability to maintain the body’s center of mass over its base of support. 1 A properly functioning balance system allows humans to see clearly while moving, identify orientation with respect to gravity, determine direction and speed of movement, and make automatic postural adjustments to maintain posture and stability in various 036 conditions and activities. Balance is achieved and maintained by a complex set of sensorimotor control systems that include sensory input from vision (sight), DID THIS ARTICLE proprioception (touch), and the vestibular system (motion, equilibrium, HELP YOU? spatial orientation); integration of that sensory input; and motor output SUPPORT VEDA @ to the eye and body muscles. Injury, disease, certain drugs, or the aging VESTIBULAR.ORG process can affect one or more of these components. In addition to the contribution of sensory information, there may also be psychological factors that impair our sense of balance. -
Shopping Wisely for Hearing Aids
Consumer’s Edge Consumer Protection Division, Maryland Office of the Attorney General Brian E. Frosh, Maryland Attorney General Listen Up! Shopping Wisely for Hearing Aids Evelyn spent $2,300 for hearing aids but they did not your problem is diagnosed properly, since a hearing loss improve her ability to hear. Although she informed the may be a symptom of a more serious medical condition. seller, he repeatedly insisted she simply needed more time to get used to them. The sales contract didn’t in- A hearing aid seller is required by federal law to inform clude the 30-day notice of cancellation as required by you that it is in your best interest to have a medical exam law. After contacting the Attorney General’s Consumer by a licensed physician. In fact, your hearing must be Protection Division, she was able to get a refund. evaluated by a doctor before you buy a hearing aid, unless you sign a statement saying you’ve waived that protection. Don’t sign it. It’s always wise to have a medical evaluation to make sure all medically treatable conditions that may affect your hearing are identified and treated before you purchase a hearing aid. What kind of doctor should you see to have your hearing evaluated? The U.S. Food and Drug Administration recom- mends an ear, nose and throat specialist (otolaryngologist), an ear specialist (otologist) or any licensed physician. Look for the right seller. Once your doctor confirms you need a hearing aid, you’ll need a hearing aid evaluation. Hearing aids can be difficult to fit, often requiring several adjustments.