Shopping bag tremor: insights from kinematic analysis

Clinical Neurophysiology Practice 2026 Open access

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Authors: Daniele Birreci, Simone Aloisio, Anna S. Grandolfo, Martina De Riggi, Luca Angelini, Antonio Cannavacciuolo, Matteo Bologna
DOI: 10.1016/j.cnp.2026.07.002
Cited by: 1
References: 10

Abstract

Background: Shopping bag tremor (SBT) is a rare activation-specific tremor characterized by weight-dependent oscillations, with uncertain nosological classification. Case Report: We report a 74-year-old woman with a right upper limb tremor triggered by carrying a shopping bag, with mild rest component. Kinematic analysis demonstrated a non-linear load-response relationship, with low tremor amplitude when unloaded, maximal at low loads (1 kg), and progressively decreasing as weight increased. No abnormalities were detected on finger tapping analysis. Discussion: This case expands the phenotypic spectrum of SBT and supports quantitative kinematic analysis as a feasible first-line tool within diagnostic algorithms for complex tremor presentations.

Fields of Study & Subjects

Neurological disorders and treatments Transcranial Magnetic Stimulation Studies Muscle activation and electromyography studies

Publication details

Journal / source
Clinical Neurophysiology Practice
Publisher
Elsevier BV
Volume
11
Pages
589–592
Publication date
1 January 2026
Language
EN