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Triceps

Last updated on Monday, June 1 2009 by blondarb

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Muscle Name: triceps

AKA:  musculus triceps brachii

Abbreviation:  

Spinal Nerve Roots:
    C6
    C7
    C8

Brachial Plexus Trunks:
    upper trunk
    middle trunk
    lower trunk

Brachial Plexus Cords:
    posterior cord

Named Nerves:
    radial nerve

Proximal Attachment:  

     Long head: Infraglenoid tubercle of scapula
     Lateral head: Posterior humerus
     Medial head: Posterior humerus

Distal Attachment:  Olecranon process of ulna

Action:  Extends the forearm

Needle Insertion:  With the arm flexed, the needle is inserted into the lateral aspect of the muscle located approximately 6 cm proximal to the olecranon.

Activation for EMG:  Extend the forearm.

Pitfalls:  

Notes: