Muscle Of the Arm Flashcards
What is anterior compartment
Numbber of Muscles that are found anterio having the same function
Name the 3 anterior compartment muscle of the arm
Biceps brachii
Coracobrachialis
Brachialis
The origin of two heads of the biceps brachii
Long head- Supraglenoid turbecle or the scapula
Short head- apex of coracoid process
The insertion and innervation of biceps brachii
Ins- Radial tuberosity
Iner- Musculocutaneous nerve
The primary function and secondary function of biceps brachii
Primary function is flexion at the elbow joint and shoulder joint
Secondary function is also adductor and supranational at shoulder joint and elbow joint
The origin, insertion and innervation of coracobrachailis muscle
Origin- apex or coracoid process
Innervation- musculocutaneous nerve
Insertion- medial surface of the humerus along the mishaft
The function of coracobrachialis muscle
Weak flexor at the shoulder joint
The origin, insertion and the innervation of brachialis muscle
Origin- distal half of the anterior surface of the humerus shaft
Inser- Ulnar tuberosity
Iner- musculocutaneous nerve
Radial nerve laterally
The function of brachialis muscle
Powerful flexion of the elbow joint
Name one muscle that lies in the posterior compartment of muscle of the arm
Triceps brachii
The origins of the heads, of triceps brachii
Long head- infraglenoid turbecle of the scapula
Lateral head- posterior surface of the humerus shaft
Medial head- posterior surface of the humerus shatf
The insertion of triceps brachii muscles
Margin of the olecranon via the broad tendon
Innervation of the triceps brachii
Radial nerve
Action of triceps brachii
Long head- extension at elbow and shoulder joint
Adduction at the shoulder joint
Lateral and medial heads- extension at the elbow joint
Which muscles are innervated by musculocutaneous
Triceps brachii
Brachialis
Coracobrachialis
