Patients with Extinction Are Unable to Detect a Visual Stimulus

question 50

Multiple Choice

Patients with extinction are unable to detect a visual stimulus presented on the contralesional side of space if

• A)the stimulus is presented alone in the visual field.
• B)this stimulus is presented at the same time as a stimulus on the ipsilesional side of the visual field.
• C)there is no cue that precedes the stimulus.
• D)the stimulus is presented with another at a more lateral position in the contralesional visual field.

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Definitions:

Interstitial Lamellae

Layers of bone matrix in compact bone that fill the spaces between osteons, providing strength and support.

Concentric Lamellae

Circular layers of bone matrix that surround the central canal within osteons, characteristic of compact bone structure.

Osteons

Cylindrical structures that comprise compact bone, containing a central canal surrounded by concentric lamellae of bone tissue.

Organic Matrix

The non-mineral, organic component of bone and teeth, made up of collagen and other proteins, which provides flexibility and strength.