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Summary
A novel physical sign, self-grasping, where one hand grasps the opposite forearm, is linked to frontal or parietal lobe lesions. This neurological sign may indicate impaired self-recognition in patients.
Area of Science:
- Neurology
- Neuroscience
- Clinical Neurology
Background:
- A distinct physical sign, termed self-grasping, involves a patient's hand grasping their contralateral forearm.
- This sign is observed in individuals exhibiting typical bilateral grasp responses.
Purpose of the Study:
- To investigate the clinical significance and neurological correlates of the self-grasping sign.
- To determine the association between self-grasping and neurological deficits such as hemiparesis and sensory extinction.
Main Methods:
- Observation and documentation of the self-grasping sign in patients with bilateral grasp responses.
- Correlation of self-grasping presence/absence with neurological examination findings, including hemiparesis and extinction of double simultaneous stimulation.
- Assessment in patients with varying levels of cooperation and cognitive status.
Main Results:
- Unilateral self-grasping was noted in 8 of 37 patients with strong bilateral grasp responses; 7 of these were hemiparetic, and 5 had sensory extinction.
- Bilateral self-grasping occurred in 2 patients.
- Patients without self-grasping showed significantly lower rates of hemiparesis and sensory extinction.
- Self-grasping served as a demonstrable focal sign in confused, uncooperative patients.
Conclusions:
- The self-grasping sign is indicative of a contralateral frontal or parietal lobe lesion.
- This neurological sign may be associated with impaired self-recognition or body schema disturbances.
- Self-grasping can be a valuable clinical indicator, particularly in patients with limited communication or cooperation.