Pectoral Region and Scapular Flashcards
(37 cards)
Where does the deltoid receive its nervous and blood supply from?
Axilary Nerve C5 and C6
Posterior circumflex humeral artery from the third section of the axillary artery.
Where does the pectoralis major muscle insert?
Inserts along the lateral lip of the bicipital groove of the humerus twisting before insertion.
What lies within the deltopectoral groove?
The cephalic vein which eventually dumps into the axillary vein along with the deltoid branch of the thoracoacromial artery (2nd part of axillary artery)
What is the main blood vessel supplying the pectoralis major and minor muscles?
The thoracoacromial arterial trunk which is from the second part of the axillary artery.
What are all the branches of the thoracoacromial trunk?
Pectoral
Deltoid
Clavicular
Acromial.
What is the origin of the deltoid?
Scapular spine
Acromion
Clavical
What makes up the borders of the quadrangular space?
Laterally the shaft of the humerus
Medially the long head of the triceps
Superiorly the teres minor
Inferiorly the Teres major.
What structures pass through the quadrangular space
Axillary nerve
Posterior circumflex humeral artery
What structure passes deep to the coracoacromial ligament?
The supraspinatous muscle filling the supraspinous fossa.
The supraspinatous receives nervous innervation and blood from what supplies?
Suprascapular artery
Suprascapular nerve
Passing through the suprascapular notch.
In regard to the suprascapular ligament, which structure passes above it and which passes below it?
Army over navy….
The suprascapular artery passes over the suprascapular ligament and the suprascapular nerve passes below it.
Supplies both the supraspinatous muscle and infraspinatous.
which head of the triceps brachii muscle passes between the teres major and teres minor muscles?
The long head of the triceps brachii muscle.
What are the boundaries of the triangular space and what structures pass through it?
Boundaries:
Long head of the triceps, and teres major muscle and teres minor.
The terminal circumflex scapular artery is here as well as the lower subscapular nerve.
What movement of the arm can occur without movement of the scapula?
The first 30 degrees of elevation of the upper limb.
At full extension of the arm (180 degrees) what angulation occurs at the glenohumeral joint and what angle of the movement occurs due to scapular rotation?
120 degrees of abduction from the glenohimeral joint.
60 degrees of abduction from rotation of the scapula.
What sort of joint is the sterno clavicular joint?
A saddle joint morphology with the functionality of a ball and socket joint.
What type of joint is the acromioclavicular joint and what ligaments is it composed of?
Plane synovial join composed of
Acromioclavicular ligament
Coracolavicular ligament
Coracoacromial ligament
Dislocation at the acromioclavicular joint is known as what classification?
Known as a shoulder separation.
Where do the stabilizing ligaments of the glenohumeral joint originate from?
The glenoid labrum holding 1/3 of the humeral head,.
Anterior dislocation is the most common sort of shoulder dislocation and is a result of what anatomic problem?
The acromial humeral joint is weakest inferiorly where it is not reinforced by the coracoacromial arch or the rotator cuff muscles.
This dislocation occurs inferiorly.
What ligaments make up the glenohumeral joint?
Superior, medial, and inferior glenohumeral ligaments.
Coracohumeral ligament
Transverse humeral ligament
Coracoacromial ligament
What ligament holds the long tendon of the biceps brachii within the bicipital groove?
The transverse humeral ligament.
What ligament reinforces superior border of glenohumeral joint and what does it prevent?
Coracoacromial ligament preventing superior dislocation.
What are the Axio-appendicular muscles?
Extrinsic muscles that attach to the upper limb of the thorax.
Includes anterior, and posterior muscles.
