EXTRINSIC FINGER FLEXORS ( HAND COMPLEX BIOMECHANICS)Physiotherapy

EXTRINSIC FINGER FLEXORS ( HAND COMPLEX BIOMECHANICS)Physiotherapy Tutorials

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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.Flexor Digitorum Superficialis 2:30
-more superficial so has higher moment arm
-crosses fewer joints hence active insufficiency is lesser
-bifurcates at campers chiasma
-creates flexion at pip joint in pinch grasp

2.Flexor Digitorum Profundus 4 :20
more active
-crossed MCP, PIP and DIP
-becomes more superficial at campers chiasma
-crosses more joints hence active insufficiency is more
-creates flexion at pip joint in pinch grasp

3.Wrist position and length tension relationship 8:30
-extensors play a major role in stabilizing the wrist and helping flexors work more efficiently


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