arm muscles Flashcards
what is the name of the shoulder joint?
ball and socket joint
what is the type of teh shoulder joint?
synovial
what are the articulating bones of teh shoulder joint?
the heead of the humerus and teh glenoid cavity
describe the movement of teh shoulder joint
flexion,extension,hyperextension, medial and lateral rotation. adduction and abduction and circumduction
what muscles help strengthena nd stablize the shoulder joint?
muscles taht surrond the joint and the rotator cuff muscles
Fill in the blank
the cuff name is given to the of the (name the uscles)
tendon of the subscalpularis, infra and suprasoinatous, and teres minor
Fill in the blank
Cuff muscles are fused to the ? of the joint
Capsule
what sides do the cuff rotator muscles cover?
anteriorly, superiorly and posteriorly
where is the weak point of the shoulder joint?
inferior
True or False
Can the shoulder joint be easily dislocated?
True
the arm muscles is surronded by?
Deep fascia
Explain the job of the deep fascia
it encloses two intramuscular septa: lateral and medial
where are the the two intramuscular septa attached to?
the supracondyler ridges of the humerus
what divides the arm into anterior and posterior compartments?
the humerus, the two intermuscular septa
name the 3 muscles of the anterior compartment of the arm
biceps brachii,coracobrachialis, brachialis
origin and insertion of coracobrachialis
origin: coracoid process / insertion: middle of the shaft of the humerus
what cord does the musculocutaneous nerve stem from?
lateral cord of brachial plexus
the actions of the biceps brachii are
flexion of the elbow joint, flexion and stabliazation of the shoulder joint and its the main supinator muscle on the radioulnar joint.
origin of the brachialis
from the medial and lateral intramsucular septa and from the lower 1/2 of the shaft of the humerus
nerve supply for brachialis
medially musculocutaneus nerve
laterally radial nerve
insertionof biceps brachii
inside the radial tuberosity
by an apenarosis into the superficial fascia
nerve supply of coracobrachialis
musculocutaneus nerve