EXSS2025 Lecture Notes - Lecture 13: Angular Acceleration, Efference Copy, Bulbous Corpuscle
4 Sep 2018
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Document Summary
How we are aware of what is occurring internally and externally. Common characteristics in sensory organs (modality, location, intensity, timing) Touch - different receptors (modality), different receptors = intensity and timing. Muscle spindles - responsive to stretch (shorten/lengthen), rate of stretch, location, intensity, timing. Joint receptors - gives sensory awareness/info on position relative to body, protects joint from injury - excessive flex/extend: free nerve endings, ruffini endings, golgi type endings, pacinian endings. Efference copy - feedforward control (initiate movement and preparing for movement), initiates sensation, prediction of movement (corollary discharge - No planned movement = no efference copy. Helps sensory system expect what efferent information will be provided (expected feedback) Important in detecting head rotation, translational movement (linear and angular acceleration) Linear acceleration = utricle and saccule (otolith organs) Reflex eye movement that stabilises retinal images during head movement. = eye movement in direction opposite to head movement. Important during posture (eg. swaying when eyes closed)
