The Direction of Movement of the Head Relative to Gravity

question 21

Multiple Choice

The direction of movement of the head relative to gravity is determined by

• A) stereocilia in a gelatinous material called a cupula.
• B) movement of fluid in the ampulla.
• C) displacement of otoliths on the otolithic membrane.
• D) asymmetric nerve impulses from proprioceptors on the left and right side of the head.
• E) integration of the visual and auditory signals in the equilibria center of the cortex.

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Definitions:

Sensory Adaptation

The process by which sensory receptors become less responsive to constant stimuli over time.

Absolute Threshold

The minimum intensity of stimulation that must occur before you experience a sensation.

Detection Threshold

The minimum level of intensity at which a stimulus is perceived or detected by the sensory system.

Just Noticeable Threshold

The minimum difference in stimulation that a person can detect 50% of the time; also known as the difference threshold.