3. Equilibrial Sense is also
called VESTIBULAR , STATIC or
BALANCE SENSATION.
If the other sense receptors are not stimulated,
this sense make it possible for us to know
whether we are :
1. Falling or going up
2.Rotating or standing
3. Going upward or downward
4.Going right side up or up side down.
4. Meanings:
responds to a change in your
head position or having your
feet lifted off of the ground;
refers to your sense of balance;
tells us the body orientation in
space,
and the sense of body
orientation with respect to
gravity.
5. 1. PHYSICAL (Stimulus)
– This sense is stimulated by:
a. changes in speed of rotation of the head,
which affects the semi-circular canals of
the inner ear.
b.Changes in the speed of movement and
changes in gravity, which stimulates the
receptors in the vestibular portion of the inner
ear.
STAGES:
6. 2. PHYSIOLOGICAL (Receptor)
*Changes in the speed of the rotation of the head stimulate
the three Semi-circular canals in the bony labyrinth of the
inner ear.
*These canals are filled with endolymph.
*The rotation of the head moves this liquid and pressure is
applied on the Cupula, a membrane at the base of the semi-
circular canals.
*The pressure on the cupula produces nerve impulses
registered at the Cerebellum in the Hindbrain.
*A change in Gravity, speed or movement deforms the hair
cells in the vestibular sacs between the semi-circular canals
and the cochlea.
*Pressure on the OTOLITHIS or crystals in the hair cells will
send nerve impulses to the brain.
