CMC JOINT OF THUMB ( HAND COMPLEX BIOMECHANICS)Physiotherapy Tutorials
diagram credits/reference : Cynthia Norkins textbook
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Reference book for this video :Cynthia Norkin
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summary of the video with the time for reference:
1. ARTICULATION -SADDLE SHAPE
PROXIMAL -CONCAVE -SAGGITAL
-ABDUCTION/ADDUCTION
PROXIMAL -CONVEX -FRONTAL
-FLEXON/EXTENSION
PROXIMAL -SPERICAL SURFACE
-CIRCUMDUCTION
DISTAL -BASE OF 1ST METACARPAL
-RECIPROCAL ARTICULATION
2.CAPSULE IS LAX IN NEUTRAL REINFORCED BY LIGAMENT
RADIAL/ULNAR LIGAMENT
DORSAL/VOLAR LIGAMENT
INTER METACARPAL LIGAMENT
KEY STABILIZERS
DORSORADIAL LIGAMENT
ANTERIOR OBLIQUE LIGAMENT
3.ROM
53 * FLEXION/EXTENSION
42* ABDUCTION/ADDUCTION
17* ROTATION/OPPOSITION
OPPOSITION = ABDUCTION+ FLEXION + ADDUCTION
3.AXIS
OBLIQUE A-P AXIS
FLEXION/EXTENSIO
OBLIQUE CORONAL AXIS
ABDUCTION/ADDUCTION
MEDIAL ORIENTATION OF TRAPEZIUM
CHANGES ORIENTATION OF THE AXIS
4.FUSION OF CMC CAN CAUSE
TRAPEZIOSCAPHOID JOINT
TO BECOME SADDLE
TRAPEZIUM HAD MORE INCONGRUENCE
IN WOMEN COMPARED TO MEN
HIGH INCIDENCE OF CMC OA IN WOMEN
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