Lateral view, left side
Lateral view, left side
Lateral view after lateral head of triceps has been transected, left side
Medial view, left sideCat information:
triceps brachii, long head
origin: caudal surface of
glenoid cavity
of scapula
insertion: olecranon process of
ulna
nerve: radial
action: extension of forearm
Posterior view, left side
Posterior (superficial) view of origin, right
Posterior view of insertion, right sideHuman information:
triceps brachii, long head
origin: infraglenoid tubercle of
scapula
insertion: olecranon process of
ulna
nerve: radial (C7-C8)
action: extension of
forearm, extend
and adduct arm
You should note the perimysium (pearlescent pantyhose) on the long head of the triceps brachii. Functionally this is important as it strengthens the muscle cells and keeps them from tearing. It is found on all skeletal muscles, but is particularly noticeable in a few muscles such as this one. The above drawings of the origin and insertion might help visualize this information (red is the origin, blue the insertion).
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2009 by William C. Johnson II
ALL RIGHTS RESERVED!
