The deep branch curves around the hook of the hamate and turns radially across the interossei
, supplying the hypothenar muscles, the ulnar two lumbricals, all the interossei
, and the adductor pollicis.
L'estensione delle dita lunghe avviene infatti attraverso un'azione sinergica tra estensori, interossei
A neurological examination demonstrated motor strength changes: 4/5 deltoid and supra and infraspinatus, 3/5 triceps, 1/5 biceps, 2/5 wrist flexion, 0/5 wrist and finger extension, 1/5 lumbricals and interossei
, 0/5 abductor pollicis brevis and 3/5 adductor pollicis on the right.
There was mild weakness of interossei, wrist extensors, gastrocnemius, and anterior tibialis.
Neurologic examination disclosed mild to moderate distal weakness in the feet, right more than left, and mild weakness of the left interossei and triceps muscles.
Examination was remarkable for significant atrophy of forearm and intrinsic hand muscles including the interossei
and right thenar eminence (Figure 2).
The first dorsal interossei
was tender to touch and felt inflamed.
Displaced fractures will usually angulate in an apex volar direction due to attachments of the interossei
Atrophy was present in the interossei
muscles of both hands.
Overuse syndrome can affect keyboard players at the wrist and finger extensors, the lumbricals (especially the fourth and fifth digits) of both hands, and the interossei
of the right hand.