Week 8

Question 1

3 main contributors to orientation?

Answer 1

Vision (visual space)

Vestibular system (inertial space)

Proprioception (internal space)

Question 2

*Components of the vestibular system?

Answer 2

Otoliths: Structures in the vestibular system that detect linear acceleration (e.g., moving forward in a car) and head tilt relative to gravity.

Semicircular canals: Fluid-filled structures that sense rotational movements of the head (e.g., turning or nodding).

Vestibular-ocular reflex (VOR): A reflex that stabilizes vision by moving the eyes in the opposite direction of head movement, ensuring a steady visual field.

Question 3

*Vestibular ocular reflex?

Answer 3

The Vestibular-Ocular Reflex (VOR) stabilizes vision during head movements by moving the eyes in the opposite direction of the head. It uses vestibular system signals to ensure a steady gaze, preventing visual blur during motion

Question 4

*Ways to test Vestibular function?

Answer 4

Real rotation: Assessing responses during head or body rotation.

Caloric stimulation: Introducing warm or cold water/air into the ear to stimulate the vestibular system.

Galvanic Vestibular Stimulation (GVS): Using electrical currents to activate vestibular nerves.

Question 5

*What does the vestibular system measure?

Answer 5

The vestibular system measures linear acceleration, tilt, and rotation, playing a crucial role in balance, orientation, and eye movements