Triceps Brachii

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Action of Triceps Brachii

All three heads extend the elbow, but the long head also extends the humerus

Origin of the Long Head

Infraglenoid tubercle of scapula (area just below socket of shoulder joint)

Brachii

Latin: of the arm

Triceps

Latin: three headed

The triceps has three heads

Long (lazy) head, lateral head, and medial head

Which of the three heads of the Triceps crosses over the shoulder joint

Long Head

Insertion of Triceps Brachii

Olecranon process (elbow) of ulna

Origin of Medial Head

Posterior (lower half of) humerus below spiral groove

Origin of the Lateral Head

Posterior (upper half of) humerus above spiral groove

What ensures that the Long Head will be worked

That the elbow is flexed


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