Shoulder and Elbow Anatomy Flashcards
Describe the arterial vasculature of the arm and forearm.
- Subclavian artery
- Axillary artery
- Brachial artery
- Radial and ulnar arteries
What does the shoulder girdle consist of?
- Scapula
- Clavicle
- Associated musculature
Where do the muscles which move the scapula take their attachment from?
The trunk
Name the dorsal muscles.
- Levator scapulae
- Rhomboids
- Latissmus dorsi
- Trapezius
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..
- Pectoralis major
- Serratus anterior
What is the action of the ventral musculature?
Adduction
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?
Deltoid muscle
What movements is the deltoid responsible for?
- Involved in almost all movement of the arm at the glenohumeral joint
- Chiefly abduction
Name the posterior group of the short scapular muscles.
- Supraspinatous
- Infraspinatous
- Teres minor
- Teres major
What is the action of the posterior short scapular muscles?
- Abduction
- External rotation
What muscle is found in the anterior group of the short scapular muscles?
Subscapularis
What is the action of the anterior short scapular muscles?
Internal rotation
What muscle spans the posterior surface of the humerus??
Triceps brachii
What is the action of triceps brachii?
Extends the arm and forearm
What is the antagonist of the triceps?
Biceps brachii
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
