This document defines and classifies unilateral spatial neglect. It is characterized by a failure to report or orient towards stimuli on the side of the body opposite a brain lesion. Neglect can be sensory or motor, and personal, peripersonal, or extrapersonal. It is also allocentric, where the left side of an object is neglected, or egocentric, where the exact midline is. The left hemisphere modulates attention to the right side, while the right modulates both, so right hemisphere strokes more commonly cause neglect due to less compensation.

1. Definition:
Characterized by failure to
report, respond or orient to the
environment toward
contralesional stimuli.
Neglect Classification:
•Sensory (Attentional) vs Motor
(Intentional) Neglect
•Personal vs Peripersonal vs
Extrapersonal
•Allocentric vs Egocentric
(Object-based vs viewer-based vs
environment-based)
Other Terminologies:
•Unilateral (Spatial) Neglect-USN
•Hemispatial neglect
•Visuo-spatial Neglect
•Left Side Inattention
•Hemi-Inattention
• Unaware of sensory stimuli on the side of
body contralateral to the site of lesion.
• Classified into modalities in which it
presents: Visual, auditory and tactile
(somatosensory)
Sensory vs Motor
• Personal Peripersonal Extrapersonal
Personal vs Peripersonal vs
Extrapersonal
• Egocentric (Viewer Based)
• Exact midline is neglected
• Allocentric (Object Based)
• Left side of an object is neglected
Allocentric vs Egocentric
•Left hemisphere is responsible for modulating attention and arousal for the right side.
•The right hemisphere is responsible for modulating attention and arousal in both the
right and left sides.
•With left hemispheric stroke, the right hemisphere is more able to compensate
resulting in a lower incidence of neglect.
•With a right hemispheric stroke, the left hemisphere is not able to fully
compensate resulting in neglect.
Muhammad Syazwan bin Mohd Yusof
Jurupulih Perubatan Carakerja U29
Hospital Rehabilitasi Cheras