The
Carpal Tunnel in cross section TLC: Tranverse Carpal Ligament; MN: Median
Nerve; T.R., S,L,H: Carpal bones; FDS, FDP, etc: Flexor Tendons
The
median nerve at the wrist travels through the carpal tunnel beneath the tranverse
capral ligament (TLC). The Ulnar Nerve has its own seperate tunnel (the
Canal of Guyon). [m.b. (m): motor branch median nerve; m.b. (u): motor
branch ulnar nerve; UN: ulnar nerve; MN: median nerve]
The
nerves of the upper extremity begins as the thoracic outlet and then travel
as long cables from the neck to the fingertips. The three nerves innervating
the hand: the median, radial, and ulnar are seen here in their entirety.
Pathology at any level can produce symptoms throughout the arm.
The
thoracic outlet. Shown are the nerves of the brachial plexus traveling
through the thoracic outlet bound in front by the anterior scalene muscle,
beneath by the first rib and behind by the middle scalene muscle.
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