upper limb muscles - arm Flashcards
how do we tell the medial septum of the arm
because of the brachial artery running through the anterior compartment on the medial side - right next to the medial intramuscular septum
what muscles are present in the posterior arm compartment
just one, the triceps brachii
what muscles are present in the anterior arm compartment
the biceps brachii, coracobrachialis, and the brachialis
most superficial is the biceps brachii - it kinda covers the brachialis
what are the attachment points of the biceps brachii muscle
long head is attached to the supraglenoid tubercule - running under the transverse humeral ligament. the short head is attached to the coracoid process. then the distal attachment is to the radial tuberosity
whats the bicipital aponeurosis
this tissue structure arises from the tendon of the biceps brachii and joins into the deep fascia of the arm.
deep fascia of the arm is called what
the brachial fascia
what movements can the biceps brachii do
flexion or the arm and forearm. also a powerful of the arm - more so when the arm is flexed
what three muscles attach to the coracoid process
short head of the biceps brachii, the coracobrachialis and the pectoralis minor
what are the attachments of the brachialis
connecting to the shaft of the humerus proximally and the ulna tuberosity distally
what movements can the brachialis do
powerful flexor of the forearm as it crosses the elbow joint to attach at the ulnar tuberosity
where does the coracobrachialis attach
the coracoid process of the scapula and the shaft of the humerus
what movements can the coracobrachialis do
arm flexion as it goes from coracoid process to humerus shaft.
what are the attachment sites of the Triceps Brachii
long head to the infraglenoid tubercule, medial and lateral heads to the shaft of the humerus.
distally all attach to the olecranon.
tell me about the arrangement of the triceps brachii muscles
theres the lateral head and medial heads lying as their name suggests. the long head also lies medially, pretty much lying on top of the medial head
what movements can the triceps brachii do
as long head is to the infraglenoid tuberucule, and rest goes to olecranon - it can do extension of the arm and forearm, also can do adduction of the arm.
