Goniometry: Thumb Metacarpophalangeal Joint Flexion and Extension

Original Editor - Joseph Ayotunde Aderonmu

Top Contributors - Joseph Ayotunde Aderonmu and Kim Jackson  

Anatomical Movement

Thumb metacarpophalangeal (MCP) joint flexion and extension

Testing Position

Thumb Metacarpophalangeal Joint Flexion

Starting Position

Patient is seated with arm rested on a table and elbow flexed. The forearm is positioned in the mid-position and the wrist is slightly positioned in extension. The MCP joint being measured is at 0° of extension.

Ending Position

The thumb MCP joint is flexed to the limit of motion.

Stabilization

The clinician stabilizes the metacarpal.

Thumb Metacarpophalangeal Joint Extension

Starting Position

Patient is seated with arm rested on a table and elbow flexed. The forearm is positioned in the mid-position and the wrist is slightly positioned in extension. The MCP joint being measured is at 0° of flexion.

Ending Position

The thumb MCP joint is extended to the limit of motion.

Stabilization

The clinician stabilizes the metacarpal.

  • Clinical Tip: The interphalangeal (IP )joint is allowed to flex/extend during flexion and extension measurements respectively.

Goniometer Placement

AXIS LOCATION STATIONARY ARM MOVEMENT ARM
Over the dorsal aspect of the MCP joint Parallel to the longitudinal axis of the shaft of the metacarpal Parallel to the longitudinal axis of the proximal phalanx

Expected Findings

Thumb MCP Joint Flexion

0-55°[2]

Thumb MCP Joint Extension

0-10°(Hyperflexion)[2]

Resources

References

  1. Physiopedia contributors, "File:Hand and wrist bones II.JPG," Physiopedia, , https://www.physio-pedia.com/index.php?title=File:Hand_and_wrist_bones_II.JPG&oldid=28946 (accessed October 14, 2020).
  2. 2.0 2.1 Ngeo JG, Tamei T, Shibata T. Continuous and simultaneous estimation of finger kinematics using inputs from an EMG-to-muscle activation model. Journal of neuroengineering and rehabilitation. 2014 Dec;11(1):1-4.