Midline Hand Drift as a Possible Sign of Neurologic Disorder.

Area of Science:

• Neuroscience
• Neurology
• Geriatrics

Background:

• Movement and posture rely on complex neural networks, including proprioception and spatial awareness.
• Neurocognitive disorders can disrupt these networks, leading to clinical findings like frontal release signs.
• Midline hand drift (MHD) is a rarely documented physical exam finding potentially linked to neurocognitive impairment.

Purpose of the Study:

• To investigate the clinical relevance and diagnostic utility of midline hand drift (MHD) in individuals with cognitive decline.
• To determine the association between MHD and neurocognitive disorders, including dementia.

Main Methods:

• A case series examining 24 individuals presenting with worsening memory.
• Physical examination to assess for MHD with arms outstretched, eyes open, and palms up.
• Review of diagnoses, including neurodegenerative disorders and cognitive impairment severity.

Main Results:

• All 24 individuals with MHD exhibited at least mild cognitive impairment.
• 22 of the 24 individuals were diagnosed with a neurodegenerative disorder (e.g., Parkinson disease dementia, Lewy body dementia, vascular dementia).
• Nine patients with MHD showed no other frontal release signs, suggesting MHD's unique diagnostic potential.

Conclusions:

• Midline hand drift (MHD) may serve as a valuable clinical indicator for diagnosing underlying neurocognitive disorders.
• MHD assessment is particularly beneficial for detecting early-stage neurocognitive decline when standard cognitive tests show only mild impairment and other neurological signs are absent.