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24 Cards in this Set

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2 groups of upper arm muscles?
1. Ventral flexor group
2. Dorsal extensor group
Name ventral group muscles?
- Brachialis muscle
- Biceps brachii muscle
- Coracobrachialis muscle
Brachialis muscle; OIF?
O: Distal anterior humerus & intermuscular septa
I: Ulnar tuberosity & joint capsule
F: Flexor of elbow joint (most important) Lift heavy loads!
Inn:
- Radial nerve
- Musculocutaneous nerve
Most important flexor of ventral upper arm muscles?
Brachialis muscle
General innervation of upper arm flexors?
Musculocutaneous nerve
General function of ventral upper arm muscles?
Flexor of elbow or shoulder joint
Biceps brachii muscle: OI?
O:
Long head: Supraglenoid tubercle
Short head: Coracoid process

Heads join together. Attach tendons split again:
I:
Strong tendon: Radial tuberosity
Flat tendon: To antebrachial fascia on ulnar side (fibers of short head)
The long head of biceps brachia muscle extend along?
Intertubercular groove of humerus
Function of long head of biceps brachia muscle?
Flexior & supinator of elbow joint
Abductor or arm & medial rotation
Anteversion of shoulder girdle
Function of short head of biceps brachii muscle?
Flexior & supinator of elbow joint
Adductor of arm
Anteversion of shoulder girdle
Which is most strongly developed of supinators and pronators of forearm?
Supinators
Innervation of biceps brachii muscle?
Musculocutaneous nerve
Coracobrachialis muscle: OIFInn?
O: Coracoid process
I: Medial surface of humerus
F: Anteversion of arm & hold humerus in joint socket
Inn: Musculocutaneous nerve
Dorsal muscles of upper arm?
Triceps brachii
Anconeus
General functions of dorsal muscles of upper arm?
Extensors of elbow joint
Innervation of dorsal extensor muscles of upper arm?
Radial nerve
How many heads of triceps brachii?
3
Origin of triceps brachii muscle?
Long head: Infraglenoid tubercle of scapula

Medial head: Dorsal surface of distal humerus (distal to radial nerve groove)
- Covered by long & lateral head

Lateral head: Proximal dorsal surface of humerus (proximal to radial nerve groove)
Insertion of triceps brachii muscle?
All 3 heads fuse to a common tendon and insert to Olecranon of ulna
Function of triceps brachii muscle?
Long head: Act on 2 joints:

Shoulder: Retroversion & adduction of arm

ALL
Extensor of elbow joint
Innervarion of triceps brachii muscle?
Radial nerve
Radial nerve comes from?
C6-C8
Musculocutaneous nerve comes from?
C5-C6
Anconeus muscle; OIFInn?
O: Dorsal surface of lateral epicondyle of humerus
I: Proximal 1/4 of dorsolateral side of ulna
F:
- Assist in triceps extension
- Tense elbow joint capsule

Inn: Radial nerve