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Lab week 7
| Question | Answer |
|---|---|
| The ___ and ___ trapezius become hypertonic while the ____ trapezius usually undergoes stretch weakness as the scapulae roll or tilt anteriorly is known as ____ | 1. upper 2. middle 3. lower 4. upper crossed syndrome |
| What other muscle that interests on the medial lip of the interubercular groove of humerus acts with the latissimus dori? | Teres major |
| The axillary nerve innervates what muscles? | 1. deltoid 2. teres minor 3. long head of triceps brachii |
| The tendon of the long head of the biceps brachii lies in the _____ and is head in place by _____ | 1. transverse humeral ligament 2. bicipital groove |
| The trapezius originates _____ and inserts_____ | 1. EOP, 1/3 of superior nuchal ligament, SP's of C7-T12 2. Lateral 1/3 clavicle, acromion, spine of scapula |
| The trapezius is innervated by _____& ____ and this artery____ | 1. MOTOR- cranial nerve 11 (spinal accessory) SENSORY- C3-C4 spinal nerves (pain and proprioception) 2. Transverse cervical or superficial cervical arteries |
| The upper/descending fibers of the trapezius _____ the scapula. The middle fibers of the trapezius ____ the scapula. The lower/ascending fibers of the trapezius ____ the scapula. When the scapula is fixed the trapezius _____. | 1. elevate 2. retract 3. contract laterally to externally rotate scapula 4. extends and laterally rotates head |
| The latissimus dorsi originates____ and inserts____ | 1. SP's pf T7-T12 - thoracolumbar fascia, iliac crest. ribs (9) 10-12 2. floor of bicipital groove |
| The latissimus dorsi is innervated by this nerve _____ and this artery____ | 1. thoracodorsal nerve C6-C8 2. Thoracodorsal artery |
| This muscle extends, adducts, medially rates the humerus, pulls body to arms while climbing, unilateral flexion, rotation and bilateral contraction for extension of thorax | latissimus dorsi |
| Rhombdoid major is ____ to rhombdois minor? | 1. inferior (major supports minor) |
| Rhombdoid major originates_____ and inserts _____ | 1. SP's of T2-T5 2. medial border of scapula from spine to inferior angle |
| Rhombdoid minor originates _____ and inserts____ | 1. Nuchal ligament, SP's of C7& T1 2. medial border pf scapula above the scapular spine |
| The Rhombdoid group does retracts and ____ rotates the scapula. This group is innervated by ______ nerve and _____ artery. | 1. inferiorly (medially) 2. dorsal scapular nerve (C5) 3. dorsal scapular artery |
| The levator scapula originates _____ and inserts____. Innervated by ____ nerve and _____ artery. | 1. posterior tubercles of Tp's of C1-C4 2. superior angle of scapula (medial border of scapula superior to root of spine of scapula) 3. dorsal scapular nerve, C4-C5 nerves 4. dorsal scapular artery |
| The levator scapula is _____ to the rhomboid minor. | 1. Superior |
| This muscle is innervated by the dorsal scapular nerve and elevates & medially rotates the scapula | Levator scapulae |
| The deltoid originates _____ and inserts___ and has ___ parts. | 1. O: lateral 1/3 of clavicle 2: I: deltoid tuberosity 3. 3 parts (anterior/clavicular, posterior/spinal and middle/acromial) |
| The deltoid is innervated by this nerve ____ and this artery_____ | 1. axillary nerve (C5-C6) 2. posterior humeral circumflex artery |
| The _____ portion of the deltoid flexes, medially rotates, horizontally flexes and horizontally adducts the arm | The anterior/clavicular deltoid |
| The ____ portion of the deltoid adducts the arm | The middle/ acromial deltoid |
| The portion____ portion of the deltoid that extends, laterally rotates, horizontally adducts, and laterally extends the arm | The posterior/Spinal deltoid |
| The most commonly injured muscle of the rotator group is innervated by what nerve? | (supraspinatus) - suprascapular nerve (C5) |
| The supraspinatus originates ____ and inserts_____. It is innervated by ____ nerve and ____ artery. | 1. supraspinatus fossa of scapula 2. superior facet of greater tubercle of humerus 3. suprascapular nerve (C5) 4. Suprascapular artery |
| What muscle assists the deltoid in the first 30 degrees of abduction of the arm and stabilizes the glenohumeral joint? | Supraspinatus |
| The infraspinatus originates _____ and inserts _____. It is innervated by this nerve____ and these arteries ____ | 1. infraspinatus fossa of scapula 2. middle facet of greater tubercle of humerus 3. suprascapular nerve (C5) 4. suprascapular and circumflex scapular arteries |
| This muscle on the posterior shoulder laterally rotates, stables the glenohumeral joint and assists in some extension of a flexed arm. | Infraspinatus |
| The teres major originates _____ and inserts _____. It is innervated by _____ nerve and ____ artery. | 1. posterior surface of inferior angle of scapula 2. medial lip of bicipital groove of humerus 3. lower subscapular nerve (C6) 4. circumflex scapular artery |
| The teres major does what actions? | Adducts and medially rotates the humerus |
| This muscle on the posterior shoulder acts with the latissimus dorsi | teres major |
| Teres minor is ____ to teres major | superior |
| Teres minor orginates _____ and inserts_____. It is innervated by _____ nerve and ____ artery | 1. middle part of lateral border of scapula 2. inferior facet of greater tubercle of humerus 3. axillary nerve 4. circumflex scapular artery |
| This muscle that is innervated by the axillary nerve laterally rotates the arm, stabilizes the glenohumeral joint, and laterally extends a flexed arm. | Teres major |
| Name the muscles beginning at the lesser tubercle the insertion of the rotator cuff muscles from anterior moving superiorly and posterity: | (SSIT) Subscapularis, supraspinatus, infraspinatus, teres minor |
| This muscle on the posterior shoulder and part of the rotator cuff - inserts at the subscapular fossa and inserts at the lesser tubercle of the humerus. It's innervated by lower and upper subscapular nerves. | Subscapularis |
| The subscapularis muscle actions include: | medially rotates the humerus, stabilizes the glenohumeral joint, aid in adduction of an abducted humerus |
| Nerve damage to this muscle results in scapular winging | Serratus anterior |
| serratus anterior originates____ and inserts______. It is innervated by ____ nerves and ______ arteries | 1. External, lateral surfaces of ribs 1-8 (9) 2. anterior medial border of the scapula 3. long thoracic (C5-7)- sometimes C8 4. lateral thoracic and thoracodorsal arteries |
| On the superficial chest this muscle has to 2 heads. | Pectoralis major |
| the clavicular head of the pectoralis major originates ______ and the sternal head originates _____ | 1. anterior surface of medial half of clavicle 2. anterior sternum, costal cartilage of ribs 1-6. aponeurosis of external oblique |
| Pectoralis major inserts_____ | lateral lip of interbuercular sulcus of humerus |
| The 2 heads of the pectoralis major are innervated by the lateral and medial pectoral nerves. The clavicular head is _____ nerves and the sternal head is innervated by _____ nerves. | 1. C5-6 2. C7-8 |
| The pectoralis major is innervated by this branch ____ from this trunk_____ | 1. pectoral branch 2. thoracocromial trunk |
| What head of the pectoralis major acts in isolation to flex the humerus? | clavicular head |
| What head of the pectoralis major acts in isolation to extend a flex humerus | sternal head |
| The collective actions of the pectoralis major are what? | adducts, medially rotates humerus, draws scapula anterior and inferiorly |
| The pectoralis minor originates _____ and inserts ___. It is innervated by ____ nerve and ____ branch of ____ trunk | 1. ribs 3-5 (6) near costal cartilage 2. coracoid process 3. medial pectoral nerve (c8-T1) 4. pectoral branch 5. thoracoacromial trunk |
| The pectoralis minor stabilizes the scapula. It draws the scapula ____ and _____ to tilt it _____ | 1. inferiorly 2. anteriorly 3. anterior tilt |
| This muscle is deep to the pectoralis major | pectoralis minor |
| This muscle originates at the junction of rib 1 and costal cartilage. It inserts at the inferior surface of the middle 1/3 of the clavicle. What is this muscles innervation (artery and nerve)? | (subclavius) 1. nerve to subclavius (C5) 2. artery- clavicular branch of thoracoacromial trunk |
| The subclavius does what actions? | -anchors and depresses clavicle -prevents dislocation of subclavicular joint during pulling motions |
| Name the heads of the triceps brachii and their origins | 1. long head- infraglenoid tubercle of scapula 2. lateral head- posterior surface of humerus superior to radial groove 3. medial head- posterior humerus inferior to radial groove |
| Which head of the triceps brachii originates on the posterior humerus inferior to the radial groove? | medial head |
| The triceps brachii insert _____ | Olecranon process and fascia of forearm |
| List the actions of the triceps brachii | extension of the elbow, stabilizes and resists dislocation of humerus LH-extends and adducts at shoulder |
| What head of the triceps is innervated by the axillary nerve? Radial nerve? | LH- axillary medial and lateral heads-radial nerve |
| What artery innervates the triceps brachii | profunda brachii artery |
| This muscle originates at the distal half of the anterior humerus and inserts at the coronoid process and ulnar tuberosity of ulna. What are the nerves that innervate this muscle. | (brachialis) nerve- musculocutaneous nerve (C5-C6) and radial nerve (C5-C7) |
| This muscle is the strongest flexor of the elbow in all positions | Brachialis |
| This muscle originates at the coracoid process and inserts at the middle 1/3 of medial shaft of humerus. It helps flex and adduct the arm. This muscle also resists dislocation of the shoulder. What is this muscles innervation (artery and nerve) | (coracobrachialis) 1. nerve- musculotaneous nerve 2. artery- brachial |
| What nerve pierces the belly of the coracobrachialis - what other nerve and artery may also pass deep to this muscle and be a site for potential entrapment. | 1. musculocutaneous nerve 2. (possible) median nerve and brachial artery |
| The biceps brachii has two head the LH and SH. Name the nerve and artery that innervate these two head. | 1. nerve- musculocutaneous nerve 2. artery- brachial artery |
| Which head of the biceps brachii originates on the supraglenoid tubercle of the scapula (and likely labrum). | Long head |
| Which head of the biceps brachii originates on the coracoid process and resists shoulder dislocation | Short head |
| The biceps brachii insert where | (mostly on radius) radial tuberosity and fascia of bicipital aponeurosis |
| List the actions of the biceps brachii | flexion of elbow (especially when supinated), supination of the forearm, aids in shoulder flexion (SH- resists shoulder dislocation) |
| These muscles retract the scapula | 1. middle fibers of trapezius 2. rhomboid group 3. inferior serratus anterior |
| These muscles depress the scapula | 1. lower fibers of trapezius 2. serratus anterior |
| These muscles elevate the scapula | 1. upper fibers of trapezius 2. levator scapulae |
| Rotates scapula | 1.Levator scapulae (inferiorly/medially rotates) 2. Rhomboid group (inferiorly/medially rotates) 3. inferior Serratus anterior (externally/upward rotates) |
| stabilizes scapula | 1. pectoralis major (inferiorly and anteriorly) 2. pectoralis minor (inferior and anterior) |
| this muscle originate at the lateral 1/3 of clavicle, acromion, and spine of scapula while the other inserts here | 1. orginates- deltoid 2. inserts- trapezius |
| The _____ inserts at the middlel facet of the greater tubercle of the humerus. The ____ insets at the superior facet. The ____ at the inferior facet. | 1. infraspinatus 2. supraspinatus 3. teres minor |
| The ____ inserts at the floor of the bicipital groove. The ____ inserts at the medial lip of the bicipital groove. | 1. latissimus dorsi 2. teres major |
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Taytay2525