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Ankle sensorimotor control and eversion strength after acute ankle inversion injuries

L Konradsen1, S Olesen, H M Hansen

  • 1Department of Orthopedic Surgery, Bispebjerg Hospital, University of Copenhagen, Denmark.

The American Journal of Sports Medicine
|February 25, 1998
PubMed
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Ankle inversion injuries can impair eversion strength and sensorimotor control. Recovery shows gradual improvement in strength and position sense, but deficits may persist even without mechanical instability.

Area of Science:

  • Orthopedics
  • Sports Medicine
  • Rehabilitation Science

Background:

  • Acute ankle inversion injuries are common, particularly in athletes.
  • These injuries can lead to persistent deficits in ankle strength and sensorimotor control.
  • Understanding the recovery trajectory is crucial for effective rehabilitation.

Purpose of the Study:

  • To monitor changes in ankle eversion strength after acute ankle inversion injury.
  • To assess the recovery of sensorimotor control functions, including peroneal reaction time and position sense.
  • To investigate the relationship between mechanical instability and functional recovery.

Main Methods:

  • Forty-four patients with grade II-III ankle inversion sprains were assessed.
  • Measurements included talar tilt, anterior talar translation, isometric eccentric eversion strength, peroneal reaction time, and position sense accuracy.

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  • Follow-up assessments were conducted at 1, 3, 6, and 12 weeks post-injury.

    • Main Results:

    • Mechanical instability was present in 19/40 patients at 1 week, decreasing to 4/40 by 12 weeks.
    • Eversion strength recovered to 96% of the contralateral side by 12 weeks.
    • Position sense error decreased from 190% at 1 week to 133% at 12 weeks, indicating persistent deficits.

    Conclusions:

    • Ankle inversion injuries lead to significant, though gradually improving, deficits in eversion strength and sensorimotor control.
    • Persistent deficits in position sense were observed even at 12 weeks post-injury.
    • Mechanical instability at 1 week did not predict greater functional deficits at later stages.