Flashcards in Shoulder and Elbow Anatomy Deck (42)
Describe the arterial vasculature of the arm and forearm.
-Radial and ulnar arteries
What does the shoulder girdle consist of?
Where do the muscles which move the scapula take their attachment from?
Name the dorsal muscles.
Describe the position of serratus anterior.
It is a ventrolateral muscle which attaches to the medial border of the scapula
What is the action of serratus anterior?
Protracts and stabilise the pectoral girdle
What is the ventral musculature of the trunk..
What is the action of the ventral musculature?
What actions occur as a result of glenohumeral rhythm?
-Abrduction of the humerus
-Upward rotation of the scapula
What produces the contour of the shoulder?
What movements is the deltoid responsible for?
-Involved in almost all movement of the arm at the glenohumeral joint
Name the posterior group of the short scapular muscles.
What is the action of the posterior short scapular muscles?
What muscle is found in the anterior group of the short scapular muscles?
What is the action of the anterior short scapular muscles?
What muscle spans the posterior surface of the humerus??
What is the action of triceps brachii?
Extends the arm and forearm
What is the antagonist of the triceps?
What are the attachments of biceps brachii?
Scapula to the radius
What does the attachment of the biceps at the radius allow?
Flexion and supination of the forearm
What action does brachialis have?
Powerful flexor of the elbow
What action does brachioradialis have?
Strong flexor but only in the mid position
What movements is the ulna involved in at the forearm?
Flexion and extension of the elbow joint
What movements is the radius involved in at the forearm?
-Flexions and extension of the elbow joint
-Prontation and supination
How is the radius able to be involved in pronation and supination?
Moves around the ulna by articulating at the superior and inferior radioulnar joints
What is the most powerful supinator?
What are the antagonists of biceps brachii (supinator power)?
What roots form the brachial plexus?
Name the trunks of the brachial plexus.