Biceps Brachii: Biceps Brachii is a two-headed muscle. The majority of the muscle mass is located anteriorly to the humerus, it has no annexation(attachment) to the bone itself. The tendon of biceps brachii enters the forearm, a connective tissue sheet is given off – the bicipital aponeurosis. This forms(bicipital aponeurosis) the roof of the cubital fossa and coalesces with the deep fascia of the anterior forearm.
Attachments of the Biceps Brachii Muscle
Origin:
Long head of the Biceps originates from the supraglenoid tubercle of the scapula
Short head of the Biceps originates from the coracoid process of the scapula
Insertion:
Both heads of the Biceps insert distally into the radial tuberosity
Actions of the Biceps Muscle
Supination of the forearm.
It also flexes the arm at the elbow and at the shoulder.
Nerve supply of the Biceps Muscle:
Musculocutaneous nerve. The bicep tendon reflex tests spinal cord segment C6.
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Upper Extremity Muscle Atlas
- Abductor Pollicis Longus
- Abductor Digiti Minimi
- Abductor Pollicis Brevis
- Adductor Pollicis
- Anconeus
- Biceps Brachii
- Brachioradialis
- Brachialis
- Coracobrachialis
- Deltoid
- Extensor Carpi Radialis Longus
- Extensor Carpi Radialis Brevis
- Extensor Carpi Ulnaris
- Extensor Digitorum
- Extensor Digiti Minimi
- Extensor Indicis
- Extensor Pollicis Longus
- Extensor Pollicis Brevis
- Flexor Carpi Radialis
- Flexor Carpi Ulnaris
- Flexor Digitorum Profundus
- Flexor Digitorum Superficialis
- Flexor Digiti Minimi Brevis
- Flexor Pollicis Brevis
- Flexor Pollicis Longus
- Infraspinatus
- Interosseous Muscles, Dorsal
- Interosseous Muscles, Palmar
- Levator Scapulae
- Latissimus Dorsi
- Opponens Digiti Minimi
- Opponens Pollicis
- Pectoralis Major
- Pectoralis Minor
- Palmaris Longus
- Pronator Quadratus
- Pronator Teres
- Rhomboid Major and Minor
- Subscapularis
- Supinator
- Serratus Anterior
- Supraspinatus
- Trapezius
- Triceps Brachii
- Teres Major
- Teres Minor
