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Anterior Shoulder and Axilla
Muscles, their attachments, overview of brachial plexus and blood supply
17
Anatomy
Graduate
02/17/2012

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Cards

Term
Anterior axioscapular muscle functions
Definition
attach the scapula to the thorax, work together to produce smooth scapular motion, provides a stable base of support for additional range of motion of the humerus
Term
Pectoralis major general function and attachment pattern
Definition
attaches humerus to clavicle and axial skeleton via three heads (clavicular, sternal, costal). Fibers converge and twist in the anterior axillary fold, pass behind the deltoid, cross the intertubercular groove to the crest of the greater tubercle
Term
Pectoralis major action and innervation
Definition
Adducts, flexes (clavicular head), extends a flexed arm (sternocostal head), and internally rotates the humerus lateral (C5-C7) and medial pectoral (C8-T1) nerves
Term
Pectoralis minor attachments, action, and innervation
Definition
P: ribs 3-5 D: corocoid process A: depression, protraction, and medial rotation of the scapula I: medial pectoral nerves (C8-T1)
Term
Subclavius attachments, action, and innervation
Definition
P: rib 1
D: clavicle
A: strengthens the SC joint, some medial rotation
I: subclavius nerve off of the superior trunk of the brachial plexus (C5-C6)
Term
Serratus anterior attachments, action, and innervation
Definition
8-9 digits: upper four insert into the anterior medial border of the scapula, lower 4-5 insert into the inferior angle of the scapula A: at the SC joint for protraction and lateral rotation of the scapula, hold medial border of the scapula against the thoracic wall I: long thoracic nerve off the roots of C5-C7
Term
Vascular supply to the UE
Definition
Brachiocephalic trunk-> subclavian artery-> Axillary artery-> Brachial artery-> Radial and ulnar arteries
Term
What divides the axillary artery into three sections?
Definition
pectoralis minor
Term
Sections and branches of the Axillary artery
Definition
1)Superior thoracic
2)Thoracoacromial
-deltoid
-pectoral
-clavicular
-acromial
Lateral thoracic
3)Subscapular
Anterior circumflex humeral
Posterior circumflex humeral
Term
Brachial plexus components and order
Definition
Roots
Trunks
Divisions
Cords
Branches
Term
Nerves originating from the posterior cord of brachial plexus
Definition
Axillary nerve (C5-C6)
Radial nerve (C5-T1)
Term
Axillary nerve roots and function
Definition
(C5-C6) shoulder abduction and shoulder sensation
Term
Radial nerve roots and function
Definition
(C5-T1) extension(elbow, wrist, and fingers) and sensation to the back of the hand
Term
Nerves originating from the lateral and medial cords of the brachial plexus
Definition
Musculocutaneous nerve (lateral cord) (C5-C7)
Median nerve (lateral and medial cords) (C5-T1)
Ulnar nerve (medial cord) (C8-T1)
Term
Musculocutaneous nerve roots and function
Definition
(C5-C7) nerve of elbow flexion and chief supinator
Term
Median nerve roots and function
Definition
(C5-T1) nerve of wrist and digit flexion, chief pronator, nerve of hand sensation
Term
Ulnar nerve roots and function
Definition
(C8-T1) nerve of hand intrinsics
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