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A reflex activity is an automatic, involuntary response to specific stimuli. It is a part of our survival mechanism, designed to protect us from potential harm. For example, when a bright light suddenly shines into our eyes, we instinctively close them or look away. This is a simple reflex activity orchestrated by the nervous system without conscious thought or effort.
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Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention
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A New Test for Trigger Finger: The Lenox Independent Flexion Test.

Daniel Barrett Polatsch1, Robert Matthew Zbeda2, Daniel P Murray2

  • 1New York Hand & Wrist Center of Lenox Hill, New York, NY, USA.

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|April 11, 2022
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Summary
This summary is machine-generated.

The Lenox Independent Flexion Test (LIFT) shows higher sensitivity for diagnosing trigger finger (TF) compared to traditional active range of motion (AROM) tests. This new method aids in diagnosing TF, particularly when triggering is not apparent during initial examination.

Keywords:
Flexor tendon entrapmentSnapping fingerTendinopathyTrigger digitsTrigger finger disorder

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Area of Science:

  • Orthopedics
  • Hand Surgery
  • Diagnostic Imaging

Background:

  • Diagnosing trigger finger (TF) can be difficult in patients without apparent triggering during initial assessment.
  • The Lenox Independent Flexion Test (LIFT) is a novel diagnostic tool for TF.
  • This study evaluates the diagnostic sensitivity of the LIFT.

Purpose of the Study:

  • To determine the sensitivity of the Lenox Independent Flexion Test (LIFT) in diagnosing trigger finger (TF).
  • To compare the sensitivity of LIFT against the classic physical examination finding of triggering or locking with active range of motion (AROM).

Main Methods:

  • Prospective study of 85 patients with 118 cases of TF over five months.
  • Exclusion criteria included trigger onset after trauma and thumb involvement.
  • Physical examination included assessment for A1 pulley tenderness, triggering/locking with AROM, and performance of the LIFT; a two-proportion test compared LIFT sensitivity to AROM triggering.

Main Results:

  • The study included 85 patients (49 women, average age 63) with 118 TFs (69 Grade I, 49 Grade II).
  • 91% of cases had a positive LIFT, compared to 44% exhibiting triggering or locking with AROM.
  • The LIFT demonstrated significantly higher sensitivity than triggering with AROM (p < .001).

Conclusions:

  • The Lenox Independent Flexion Test (LIFT) is more sensitive for diagnosing trigger digits than active range of motion (AROM) testing.
  • LIFT proves particularly valuable for diagnosing trigger finger (TF) in patients who do not exhibit triggering during the initial clinical presentation.