Disordered Representations of Space - Neglect and Extinction

This set of flashcards covers key concepts related to neglect and extinction as presented in the lecture on disordered representations of space.

Hemi-spatial neglect

A condition characterized by the failure to attend to stimuli on the side of space opposite the brain lesion, without primary sensory or motor loss.

Neglect behavior

Examples include failing to shave one side of the face, missing food on one side of the plate, or bumping into objects on one side.

Catherine Bergego Scale

A behavioral assessment tool used to measure neglect, scoring from no neglect to severe neglect.

Neglect sub-types

Various forms of neglect including Left vs. right, Near vs. far, and Object-based vs. space-based.

Extinction

A condition where a patient may be unable to report stimuli in the presence of competing stimuli.

Visual field loss

Occurs when the brain fails to register incoming visual signals; can be confused with neglect.

Attentional orienting hypothesis

Suggests that each hemisphere generates a contralateral attentional bias, with the left hemisphere's rightward bias being stronger.

Blindsight

A phenomenon where a patient is blind to stimuli but can report their presence, indicating intact but unconscious visual processing.

Neglect as an attentional disorder

Neglect occurs in the absence of primary sensory and motor loss, often mitigated by verbal prompting.

Neglectogenic lesions

Brain lesions, particularly in the right hemisphere, that result in neglect; severity of neglect does not predict lesion location.