Muscles Quiz Flashcards
Levator scapulae movements, innervation
- elevation of pectoral girdle
- medial rotation of scapula in adduction
- dorsal scapular
- C(4), 5
Function and innervation of trapezius
- upper fibers: elevation of pectoral girdle, lateral rotation of scapula in abduction
- middle fibers: scapular retraction
- lower fibers: depression of scapula, lateral rotation of scapula in abduction
- Accessory CN XI (C1-C5)
Function and innervation of rhomboid major
- scapular retraction
- medial rotation of scapula
- elevation of scapula
- Dorsal scapular C5
Function and innervation of rhomboid minor
- scapular retraction
- medial rotation of scapula
- elevation of scapula
- Dorsal scapular C5
Function and innervation of pectoralis minor
- scapular depression
- protraction of scapula
- medial rotation of scapula in adduction
- medial pectoral C7,8
Function and innervation of latissimus dorsi
- extension
- adduction
- medial rotation
- scapular depression
- Thoracodorsal C6,7,8
Function and innervation of pectoralis major
- flexion of arm
- adduction of arm
- medial rotation of arm
- depression of scapula/pectoral girdle
- medial and lateral pectoral nerve C5-T1
Function and innervation of serratus anterior
- scapular protraction
- lateral rotation of scapula is abduction
- Long thoracic C5,6,7
Muscles involved in elevation of shoulder/PG
- levator scapulae
- trapezius (upper)
- rhomboid major
- rhomboid minor
Muscles involved in depression of shoulder/PG
- Pectoralis minor
- Trapezius (lower)
- Latissimus dorsi
- Pectoralis major (sternocostal part)
Muscles involved in protraction of shoulder
- serratus anterior
- pectoralis minor
Muscles involved in retraction of shoulder
- rhomboid major
- rhomboid minor
- trapezius (middle)
Muscles involved in lateral rotation of scapula in abduction
- serratus anterior
- trapezius (upper and lower)
Muscles involved in medial rotation of scapula in adduction
- rhomboid major
- rhomboid minor
- levator scapulae
- pectoralis minor
Deltoid function and innervation
- abductor
- extension of arm
- lateral rotation
- medial rotation
- flexion of arm
- Axillary nerve C5,6
Biceps brachii function and innervation
- flexion of arm at shoulder
- flexion of arm at elbow
- supination at radio-ulnar joint
- musculocutaneous nerve C5,6
Coracobrachialis function and innervation
- flexion of arm
- musculocutaneous nerve C 5,6
Teres major function and innervation
- extension of arm
- adduction of arm
- medial rotation
- lower subscapular nerve C5,6
Supraspinatus function and innervation
- abduction
- suprascapular nerve C5,6
Infraspinatus function and innervation
- lateral rotation
- suprascapular nerve C5,6
Teres minor function and innervation
- lateral rotation
- axillary nerve C5,6*
Subscapularis function and innervation
- medial rotation
- upper and lower subscapular nerve C5,6
Muscles involved with flexion of the arm at shoulder
- pectoralis major
- deltoid
- biceps
- coracobrachialis
Muscles involved with extension of the arm at shoulder
- deltoid
- latissimus dorsi
- teres major
Muscles involved with abduction of the arm at shoulder
- deltoid
- supraspinatous
Muscles involved with adduction of the arm at shoulder
- pectoralis major
- latissimus dorsi
- teres major
Muscles involved with lateral rotation of arm at shoulder
- deltoid
- infraspinatus
- teres minor
Muscules involved with medial rotation of arm at shoulder
- pectoralis major
- latissimus dorsi
- deltoid
- teres major
- subscapularis
Which muscles flex the thumb. Be sure to list which joints they flex at and their innervations.
- all joints (CM, MP, esp. IP): flexor pollicis longus; anterior interosseous n (median n branch)
- Flexor pollicis brevis: CM and MP: recurrent branch of median n
- Opponens pollicis: CM only; recurrent branch of median nerve
- all 8,1 segments
Which muscles extend the thumb. List the joints they act at, their innervations, and segments.
- extensor pollicis longus: CM, MP, IP; posterior interosseous n; 7,8
- extensor pollicis brevis: CM and MP; posterior interosseous n (7,8)
- Abductor pollicis longus: CM only, posterior interosseous n (7,8)
- Abductor pollicis brevis: IP only; recurrent branch of median n (6-1)
Which muscles abduct the thumb? Which joints do they act at and what are their innervations?
- abductor pollicis longus: CM only; posterior interosseous n; 7,8
- abductor pollicis brevis: CM and MP; recurrent branch of median n; 6-1
Which muscles adduct the thumb? Which joints do they act at and what is the innervation?
-adductor pollicis: CM and MP; ulnar n (deep branch); 8,1
Which muscles are responsible for opposition and medial rotation of the thumb? Give the innervation and segments.
-opponens pollicis; recurrent branch of median n; 6-1
Function and innervation of flexor pollicis longus
- flexes at all joints: wrist, CM, MP, IP**
- anterior interosseous n branch of median nerve
Function and innervation of flexor pollicis brevis
- flex thumb at MP and CM
- median recurrent branch
function and innervation of opponens pollicis
- flex at CM
- oppose and medially rotate thumb
- recurrent branch of median nerve
Function and innervation of extensor pollicis longus and brevis
- longus: extend wrist, CM, MP, and IP; posterior interosseous nerve
- brevis: extend CM and MP; posterior interosseous nerve
Function and innervation of abductor pollicis longus
- extends and abducts at CM joint only
- abducts wrist
- posterior interosseous nerve