An Optimal Ulnar-Deviated PA Axial (Scaphoid) Wrist Projection Demonstrates All

question 57

Multiple Choice

An optimal ulnar-deviated PA axial (scaphoid) wrist projection demonstrates all of the following except

• A) the scaphoid fat stripe.
• B) open scaphotrapezium and scaphotrapezoidal joint spaces.
• C) a closed radioscaphoid joint space.
• D) alignment of the long axis of the first metacarpal and radius.

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Definitions:

Lightness Constancy

The ability to perceive the color (or lightness) of an object as constant under varying lighting conditions.

Brightest

Having the most light or luminosity; often used metaphorically to describe highly intelligent or clever individuals.

Brightness Contrast

The appearance of a differently illuminated areas in the field of vision, resulting in the perception of varying levels of light intensity.

Lateral Inhibition

A neurological process where the firing rate of a neuron is decreased due to the activity of neighboring neurons, enhancing contrast in sensory perception.