Which Is an Action of the Flexor Pollicis Brevis

question 61

Multiple Choice

Which is an action of the flexor pollicis brevis?

• A)adduction of the thumb at the carpometacarpal joint
• B)flexion of the thumb at the carpometacarpal joint
• C)lateral rotation of the thumb at the carpometacarpal joint
• D)flexion of the index finger (finger number two)at the carpometacarpal joint

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Definitions:

Interposition

A visual cue used to perceive depth, where one object partially covers another, indicating that the covering object is closer.

Perceptual Constancy

The psychological feature that allows the perception of an object to remain relatively unchanged despite variations in the conditions of observation.

Binocular Depth Cues

Visual information taken in by two eyes that enable us to estimate the depth or distance of an object.

Visual Illusions

Optical phenomena where the observed image differs significantly from the actual object, leading to misinterpretation of its true nature.