PT Final Flashcards
(103 cards)
Three systems that integrate afferent input to efferent output
vision, peripheral vestibular system(semi circ. canals), somatosensory system (propricoeption, cerebellum)
gaze stabilization is
walking while keeping eyes fixed
cervico ocular reflex
fixation of eyes while moving neck
optokinetic reflex
maintains eye position with movements of the head
movement within the labyrinth causes:
eye moevements and postural adjustments
what is the NS goal in standing biomechanics?
keep the center of gravity centered between the base of support
Semicircular canals detect BLANKK acceleration
angular
Angular acceleration=
head rotation or change in velocity along a curve
Utricle and Saccule detect BLANKK acceleration
linear
Linear acceleration =
head velocity along a straight line
main purpose of vestibular mechanism is to
maintain visual eye fixation
Doll’s Head Response
Eyes fixated on a spot and will move in a direction opposite to head movement
Utricle and saccule togethere detect
the direction of gravity
visual input travels through what tract?
medial fasciculus tract
Perception of Motion is the
ability to differentiate the movement in the environment from one’s self
INput from 6 things allows smooth pursuit to occur
cerebellul, extra ocular eye muscles, cervico-mechano receptors, vestibular apparatus, retina, cervical muscles
saccade allows
the ability to focus the eye on an object of interest
explain the effect whip lash has on blurry vision
whip lash affects the cervical spine, and the CNS uses cervical muscles to intitiate and brake the head/neck movements
cervico occular reflex
maintains eye fixation with neck movement
Vistibulo occular reflex
maintains eye posi tion with movement of the head
Unilateral or bilateral have increase dizziness?
unilateral due to an imbalance b/t the two vestibular systems.
Proprioception
the sense of position, posture, and movement
Largest abundance of mechanoreceptors in the spine located?
upper cervical vertebrae
The highest concentration of mechanoreceptors is located in what area of a muscle spindle?
belly