Hemispatial neglect: Subtypes, neuroanatomy, and disability

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Clinical Psychology

Background:

• Right hemisphere stroke frequently leads to visuospatial neglect, a complex neurological disorder.
• Understanding neglect subtypes and their neuroanatomic correlates is crucial for effective rehabilitation.

Purpose of the Study:

• To determine the frequency of motor, perceptual, peripersonal, and personal neglect subtypes.
• To investigate associations between neglect, attention deficits, anosognosia, and stroke severity.
• To identify the neuroanatomic basis of neglect in right hemisphere stroke patients.

Main Methods:

• Assessed 166 right hemisphere stroke patients using neglect, attention, and functional measures.
• Evaluated motor, sensory, and cognitive deficits, alongside functional disability and family burden.
• Conducted detailed lesion analyses to map brain damage.

Main Results:

• 48% of patients exhibited neglect, often co-occurring with motor impairment, sensory deficits, and anosognosia.
• Peripersonal (27%) and perceptual (21%) neglect were most common, followed by motor neglect (17%).
• Neglect severity, not lesion extent, accurately predicted functional independence and family burden.

Conclusions:

• The neglect syndrome itself is a strong predictor of poor outcomes post-right hemisphere stroke.
• Distinct neglect subtypes were supported by dissociations in task performance.
• Neglect arises from damage within a distributed neural network involved in attention and spatiomotor control.