Upper Extremity: Arm Compartments Flashcards
posterior muscles= __ function and
Anterior muscles = __ function.
posterior muscles= extensor function and
Anterior muscles = flexor function.
the innervation pattern matches th ecompartments
3 muscles of the anteiror compartment of the arm
- biceps brachii
- coracobrachialis
- brachialis.
therefor, function is flexion since they are anterior
Anterior compartment of the arm:
OIF of bicep(s? brachii
o; short head: coracoid process of scapula
long head; supraglenoid tubercle of scapula
I; tuberosity of radius
F: supination at radioulnar joint, flexion at elbow, flexion at glenohumeral joint
OIF of coracobrachialis
O; coracoid process of the scapula
I; shaft of humerus-medial aspect
F; flexion and adduction at glenohumeral joint
OIF of brachialis
O; shaft of humerus- anterior aspect
I; coronoid process of ulna
F; flexion at elbow
brachialis is number 3
The coracobrachialis flexes the __ and the brachialis flexes the ___.
The coracobrachialis flexes the shoulder and the brachialis flexes the elbow.
label Deep dissection Anterior compartment of the arm
muscles of the posterior arm
triceps brachii (long, lateral and medial heads)
all three heads attach to the olecranon process of the ulna
OIF of triceps brachiil long head
O; infraglenoid tubercle of scapula
I; olecranon process of ulna
Function; extension at elbow. also performs extension and adduction at GH joint.
OIF of triceps brachii lateral head and medial head
O; shaft of humerus (posterior)
i; olecranon process of ulna
F; extension at elbow
all triceps insert at the __ ___ of the ulna
olecranon process of ulna
which tricep head is the deepest
the medial head of the tricep lies deep to the lateral and the long heaads.
