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Upper Extremities

Kin 3350; Upper extremities

QuestionAnswer
What is the only bony attachment upper extremity has to the trunk and therefore transfers force from upper extremity to trunk? Clavicle
What is the articulation between the scapular and the humerus? GlenoHumeral Joint (GH Joint)
What are the 3 joints of the CLAVICLE? sternoclavicular (SC) joint, acromioclavicular (AC) joint, and coracoclavicular joint
SC Joint: the sternal end of the clavicle lies in the ________ of the manubrium clavicular notch
What is the movement of the Sternoclavicular (SC) joint? gliding/rotational
What stabilizes the Sternoclavicular (SC) joint? bony arrangement, ligaments, and the subclavius muscle
What are the 3 primary ligaments of the sternoclavicular joint? Interclavicular ligament, sternoclavicular ligament, and costoclavicular ligament
What ligament straps down the supraspinatus muscle? coracoacromial ligament
How does the acromioclavicular (AC) Joint move? slight gliding movement when elevation and depression takes place
What functions as a joint capsule, totally surrounding the clavicle and the Acromion process? Acromioclavicular ligament
What are the two portions of the coracoclavicular ligament? Conoid and trapezoid
What is the slight movement allowed for the trapezoid of the coracoclavicular ligament? more lateral. Opposes forward, upward, and lateral movement of clavicle
What is the slight movement of the conoid of the coracoclavicular ligament? opposes backward, upward, and medial movement
What ligament lies beneath the anterior surface of the shoulder joint capsule and reinforce the capsule? glenohumeral ligament
The capsular ligament attaches the anatomical neck to circumference of the ______ glenoid of the scapula
Coracohumeral ligament passes from base of ________ to anterior aspect of humerus coracoid process;
What ligament crosses the suprascapular notch, converting it to a foramen for the suprascapular nerve to pass through? superior transverse scapular ligament
Which ligament crosses the great scapular notch (spino-glenoid notch) forming it as a tunnel for passage of suprascapular nerve and transverse, scapular blood vessels to infraspinatus muscle inferior transverse scapular ligament
What functions to limit the superior movement of the humeral head? Coracoacromial ligament
What helps deepen the glenoid fossa, adding stability to the shoulder joint? Glenoid lip or labrum
What ligament crosses the intertubecular groove and hold the tendon of biceps long head in the groove? transverse humeral ligament
What constitutes the entire nerve supply for upper extremities and shoulder region? Brachial plexus
Ventral or anterior rami of spinal nerves ______________ form a network or plexus called the brachial plexus C5, C6, C7, C8, T1
What does the shoulder JOINT consist of? Humerus and scapula
What does the shoulder GIRDLE consist of? scapula, humerus, and clavicle
What are the 5 nerves that radiate down the arm from the brachial plexus? Axillary, Radial nerve, musculocutaneous, median nerve, and ulnar nerve
The axillary nerve innervate what muscles? Deltoid and teres minor (from posterior cord)
The radial nerve of the brachial plexus innervate what? The posterior arm and forearm (posterior cord)
The musculocutaneous nerve of the brachial plexus innervate what? the flexors in arm (from lateral cord)
The median nerve of the brachial plexus innervate what? most muscles of anterior forearm and some muscles of the palm (lateral and medial cord)
The ulnar nerve of the brachial plexus innervate what? The anteromedial muscles of forearm + muscles of palm (medial cord)
What are the Rotator Cuff Muscles? SITS - Supraspinatus, Infraspinatus, Teres minor, Subscapularis
What is the primary purpose of the Rotator cuff? To maintain joint stability
Where does the supraspinatus muscle originate? Supraspinous fossa (medial
Where does the supraspinatus muscle insert? Proximal facet of the greater tubercle of the humerus
What is the action of the supraspinatus muscle? Shoulder abduction and stabilizer of the GH Joint
What muscle(s) is the synergist for the supraspinatus muscle? Deltoid
What is the nerve for the supraspinatus muscle? Suprascapular nerve
Where does the Infraspinatus originate? Infraspinous fossa
Where does the infraspinatus muscle insert? Middle facet of the greater tubercle of the humerus
What is the action(s) for the infraspinatus muscle? external/lateral rotation and extension and GH joint stability
What muscle(s) are the synergists for the infraspinatus muscle? teres minor, post deltoid (external rotation); posterior deltoid, latissimus dorsi, teres major
What is the nerve that innervates the infraspinatus muscle? Suprascapular nerve
Where does the Teres minor originate? upper and middle portions of the lateral border of the scapula
Where does the teres minor muscle insert? distal facet of greater tubercle
What is the action(s) of the teres minor muscle external rotation and extension; stabilization of the GH Joint
What muscle(s) is the synergists for the teres minor muscle? infraspinatus, post deltoid (external rotation), post. deltoid; latissimus dorsi, teres major
What is the nerve that innervates the teres minor muscle Axillary Nerve
Where does the subscapularis muscle originate? Subscapular fossa
Where does the subscapularis muscle insert? Lesser tubercle of the humerus
What is the action(s) of the subscapularis muscle? Shoulder flexion; medial (internal) rotation; stabilizes GH Joint
What muscle(s) is the synergists for the subscapularis muscle? teres major, pectoralis major, latissimus dorsi (medial rotation)
What is the nerve that innervates the subscapularis muscle upper and lower subscapular nerve
The deltoid has 3 parts. Where does the anterior part of the deltoid originate? lateral /anterior clavicle
The deltoid has 3 parts. Where does the middle part of the deltoid originate? lateral acromion process
the deltoid has 3 parts. Where does the posterior part of the deltoid originate? Inferior spine of scapula
Where does the deltoids insert? deltoid tuberosity
What is the action all three heads of the deltoid do? abduction of the shoulder and one ABDucted to horizontal position, moving beyond the horizontal position, all heads are considered ADDuctors
What is the action of the ANTERIOR deltoid muscle? adduction, flexion, internal rotation of shoulder; horizontal adduction
What is the action for the MIDDLE deltoid muscle abduction of shoulder
What is the action for the Posterior deltoid muscle adduction, extension, external rotation of shoulder, horizontal abduction
What muscle(s) is the synergists for the deltoids? supraspinatus (abduction); clavicular portion of pectoralis; biceps brachii (Flexion); latissimus dorsi, teres major (extension)
What nerve innervates the deltoids? axillary
Where does the pectoralis minor muscle originate? costal (rib) bones 3-5
Where does the pectoralis minor muscle insert? coracoid process
What is the action(s) of the pectoralis minor? downward rotation; protraction; depression of scapular; anterior shoulder stabilizer
What is the reverse origin-insertion action of the pectoralis minor? elevates ribs during inspiration when scapula is fixed
what muscle is the synergists for the pectoralis minor muscle? serratus anterior (protraction, stabilizer)
What nerve innervates the pectoralis minor muscle? medial pectoral (C8-T1)
Where does the serratus anterior muscle originate? anterior lateral aspect of upper 9 ribs
Where does the serratus anterior muscle insert? anterior surface of vertebral border of scapula
What is the action(s) of the serratus anterior muscle? stabilizes scapula' rotates scapula upward and laterally; protraction, depression
What is the reversed origin-insertion action of the serratus anterior muscle? elevates ribs during inspiration when scapula is fixed
What muscle(S) is the synergists for serratus anterior? trapezius (lat. rotation); pectoralis minor (protraction, stabilizer)
What nerve innervates the serratus anterior muscle? Long thoracic
Where does the subclavius muscle originate? 1st rib at junction of costal cartilage
Where does the subclavius muscle originate subclavian groove on inferior surface of clavicle, between costoclavicular conoid ligaments
What is the action(s) of the subclavius? depresses clavicle;pulls it inferiorly and anteriorly; assists SC ligaments with joint stability
What nerve innervates the subclavian muscle? subclavian nerve
Where does the levator scapulae muscle originate? transverse process of 1st 4 cervical vertebrae
Where does the levator scapular muscle insert? superior aspect of vertebral border of scapula
What is the action(s) of the levator scapulae? elevation, downward rotation, retraction of scapula
What is the reversed origin-insertion action of the levator scapulae muscle? if scapula is fixed, lateral flexion and slight rotation of cervical spine to same side
What is the nerve that innervates the levator scapulae muscle? dorsal scapular
Where does the rhomboid muscle originate? spinous process of C7-T5
Where does the rhomboid muscle insert? Vertebral border of scapula
What is the action(s) of the rhomboid muscle? scapular elevation; retraction; downward rotation
What is the muscle that is a synergist to the rhomboids? trapezius; levator scapulae (elevation, retraction) ; levator scapulae, pectoralis minor (downward rotation)
What nerve innervates the rhomboid? dorsal scapular
Created by: elizabethcosio