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📘 How balance organs sense rotation

Trace semicircular canals, endolymph inertia, cupulae, hair cells, reflexes, and three-dimensional balance.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

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What you’ll learn

Rotation
Endolymph
Cupula
Paired canals
Three planes
Vestibular nerve
VOR
Posture
Adaptation
Integration

Questions this course answers

What do semicircular canals primarily detect?

They respond to rotational acceleration and deceleration.

Why does endolymph bend the cupula?

Relative fluid motion deflects the flexible cupula.

What do hair cells transduce?

Stereocilia bending alters hair-cell electrical and transmitter output.

What does the vestibulo-ocular reflex do?

The VOR keeps retinal images stable during head movement.

Why can spinning cause an aftereffect?

Endolymph inertia briefly reverses cupula deflection at the stop.

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