Pectoral Region Flashcards
The platysma muscle is _________ to the clavicle
Superficial
The cephalic vein is found ___________ the deltoid & clavicular head of the pectoralis major (delto-pectoral groove)
In between
The medial pectoral nerve ______ the pectoralis minor as it approaches the deep aspect of the sternocostal head of the pectoralis major muscle
Pierces
The lateral pectoral nerve innervates the ____________ of the clavicular head of the pectoralis major
Deep aspect
The thoracoacromial trunk __________ to the pectoralis major
Passes medial
The pectoral branch of the thoracoacromial artery is _____ to the pectoralis major
Deep
The pectoralis minor is _____ to the pectoralis major
Deep
What are the joints of the shoulder girdle? (4)
Sternoclavicular, acromioclavicular , glenohumeral, scapulothoracic
What kind of joint is sternoclavicular?
Saddle or seller
What kind of joint is acromioclavicular?
Plane or gliding
What kind of joint is glenohumural?
Ball and socket
What kind of joint is scapulothoracic?
Pseudo-joint (necessary for full glenohumeral function)
What are the two coracoclavicular ligaments and their attachments and function?
Trapezoid - coracoid process to trapezoid line of clavicle.
Conoid - coracoid process to conoid tubercle of clavicle.
Stabilize AC joint to limit medial displacement. Protraction and elevation.
Name the acromioclavicular ligament attachments and function.
Superior aspect of acromial end of clavicle to adjacant acromion.
Stabilizes AC joint
Name the coracoacromial ligament attachments and function.
Lateral border of coracoid process to acromion adjacent to clavicular articulation.
Prevents superior displacement of humeral head by forming the coracoacromial arch.
Name the coracohumeral ligament attachments and function.
Base of coracoid process to anterior aspect of greater tubercle.
Reinforces superoanterior aspects of joint capsule.
Name the costoclavicular ligament attachments and function.
Superior aspect of cartilage of first rib to undersurface of the clavicle
Stabilizes SC Joint, limiting elevation of clavicle.
Name the superior transverse scapular ligament attachments and function.
Base of coracoid process to the medial edge of the scapular notch.
Closes off the suprascapular notch.
Name the 3 glenohumeral ligaments, and attachments and function.
Superior, middle and inferior.
From upper part of medial margin of glenoid cavity to lesser tubercle and anatomical neck of humerus.
Stabilizes GH articulation.
What are the AAI of pectoralis major?
Attachments- clavicle, costal cartilages, sternum and aponeurosis of the external oblique to the lateral lip of the intertuberucular sulcus of humerus.
Action- humeral adduction, FLX, and medial rotation (sternocostal portion assists with extension of the flexed arm)
Innervation- medial and lateral pectoral nerves.
Spinal Cord Segments- C5-6 (clavicular head) C7-T1 (Sternocostal head)
What are the AAI of pectoralis minor?
Attachments- outer surfaces of ribs 3-5 to the coracoid process.
Actions- anterior tilt of scapula; assists with depression of the shoulder and forces inspiration.
Innervation- medial and lateral pectoral nerves.
Spinal Cord Segments- C5-T1
What are the AAI of the subclavius muscle?
Attachements- 1st rib and cartilage to the undersurface of the clavicle.
Actions- depresses and stabilizes clavicle
Innervation- subclavian nerve
Spinal Cord Segments- C5-6
