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Discriminative sensory dysfunction after unilateral stroke

J S Kim1, S Choi-Kwon

  • 1Department of Neurology, University of Ulsan, Asan Medical Center, Seoul, South Korea.

Stroke
|April 1, 1996
PubMed
Summary
This summary is machine-generated.

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Discriminative sensory deficits are common after unilateral stroke, affecting even patients with normal results on standard tests. These subtle impairments, sometimes bilateral, may explain unexplained clumsiness in stroke survivors.

Area of Science:

  • Neuroscience
  • Neurology
  • Stroke Rehabilitation

Background:

  • Sensory deficits are known stroke complications.
  • Dysfunction of discriminative sensation after unilateral stroke is understudied.
  • The prevalence and patterns of bilateral sensory impairment require clarification.

Purpose of the Study:

  • To investigate the frequency and types of discriminative sensory dysfunction in acute unilateral stroke.
  • To determine if sensory impairments occur bilaterally.
  • To correlate sensory deficits with lesion location.

Main Methods:

  • Evaluated discriminative sensations (texture, two-point, stereognosis, point localization, position sense) in 67 unilateral stroke patients.
  • Used CT/MRI to identify lesion locations.

Related Experiment Videos

  • Compared findings with 32 healthy controls.

    • Main Results:

    • 57 of 67 patients (85%) showed impaired discriminative sensation, irrespective of lesion site (except lateral medullary infarction).
    • Only 3 of 25 patients with pure motor stroke had intact sensation on conventional tests.
    • Point localization and stereognosis were bilaterally impaired in a significant subset of patients.

    Conclusions:

    • Discriminative sensory disturbances are frequent in unilateral stroke, often presenting bilaterally.
    • These subtle deficits, missed by routine exams, may contribute to unexplained motor clumsiness.
    • Findings highlight the importance of assessing detailed sensory function in stroke recovery.