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Tremor-like grasp phenomenon: case series study.

Yuichiro Inatomi1, Yukiko Suzuki2, Makoto Nakajima3

  • 1Department of Neurology, Saiseikai Kumamoto Hospital, Chikami 5-3-1, Minami-ku, Kumamoto, 861-4193, Japan. y.inatomix@silk.ocn.ne.jp.

Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology
|July 12, 2022
PubMed
Summary
This summary is machine-generated.

This study describes a rare "tremor-like grasp phenomenon" in four elderly women. These involuntary movements are linked to frontal lobe hyperexcitation and are a variation of the grasp reflex.

Keywords:
Frontal lobeGrasp phenomenonGrasp reflexInstinctive grasp reactionTremor

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Area of Science:

  • Neurology
  • Movement Disorders
  • Neuroscience

Background:

  • The grasp phenomenon, characterized by grasp reflex and instinctive grasping, is rarely associated with tremor-like movements.
  • This study investigates a specific presentation of abnormal movements linked to the grasp phenomenon.

Purpose of the Study:

  • To clinically and neuroradiologically characterize tremor-like movements associated with the grasp phenomenon.
  • To explore the underlying pathophysiology and potential neurological correlates of this rare condition.

Main Methods:

  • Clinical assessment of four patients presenting with tremor-like movements and grasp phenomenon.
  • Neuroradiological investigations including MRI and CT scans to identify potential brain lesions.
  • Detailed analysis of movement characteristics, onset, and associated neurological signs.

Main Results:

  • Four female patients (aged 61-98) exhibited stereotypic, rhythmic, tremor-like movements, often with groping/picking actions.
  • All patients displayed the grasp phenomenon (reflex or instinctive grasping) ipsilateral to the movements.
  • Associated findings included cerebral infarcts (n=2), meningioma (n=1), or history of focal seizures (n=1).

Conclusions:

  • The observed tremor-like movements are a distinct variation of the grasp phenomenon, termed "tremor-like grasp phenomenon."
  • These movements are likely caused by hyperexcitation of the frontal lobe contralateral to the affected side.
  • The findings highlight a novel presentation of the grasp phenomenon with potential implications for understanding frontal lobe dysfunction.