Tríceps Braquial

Brachial Triceps.
The triceps is a muscle located in the posterior arm. It consists on top of three parts: long portion, inner and outer vast. It is the only muscle found in the back of the arm.
• the long portion has its origin in the bottom of the glenoid of the scapula.
• The vastus lateralis in the intermuscular aponeurosis and posterior aspect of the humerus.
• The vastus in the intermuscular aponeurosis and posterior aspect of the humerus.
• The three portions are inserted via a common tendon, on the back side and edges of the olecranon.
Origins and insertions: triceps in Latin means three heads. Therefore it has three origins and a single insertion:
• Long head: from the infraglenoid tubercle of the scapula.
• Lateral head: above the channel line torque (groove for the radial nerve also known radial channel).
• Medial head: below the lower channel line torque (below the lateral head).
• The three heads are inserted through the triceps tendon in the olecranon.
Innervation: the radial nerve innervates. (C6, C7, C8, T1) Sometimes the medial head of the triceps brachii may also have a innervation of the ulnar nerve.
Vascularization: irrigates the deep brachial artery.
Functions.
It is the main extensor forearm in the elbow joint, so it can also extend and adduct the humerus. Around makes a synergistic action of extension, because it is located in the back of the arm.
The relevance of the triceps brachii in the posterior region of the scapula is that its vertical arrangement between the teres minor and teres major, with these muscles and humerus, form spaces through which pass nerves and vessels from one region to another.
Withstands the decline of the humeral head.