homework 10
Which of the following nerves arise from the brachial plexus? 1. ulnar nerve 2. femoral nerve 3. median nerve 4. obturator nerve 5. axillary nerve 6. musculocutaneous nerve 7. sciatic nerve 8. radial nerve 9. tibial nerve 10. common fibular nerve 1-10 2, 4, 7, 9, and 10 1, 3, 5, 6, and 8 3, 4, 6, 8 2, 5, 7, 8
1, 3, 5, 6, and 8
A muscle with an origin in the supraspinous fossa and an insertion at the head of the humerus 1. causes adduction of the shoulder joint 2. causes depression of the scapula 3. is part of the rotator cuff 1 only 2 only 3 only 1 and 3
3 only
A separated shoulder is an injury to the shoulder (glenohumeral joint). True False
False
The trapezius muscle of the neck is named according to its: shape size location action number of tendons of origin
Shape
Which of the following muscles make up the rotator cuff? supraspinatus infraspinatus subscapularis all of the choices are correct
all of the choices are correct
The shoulder (glenohumeral) joint is a ___________ synovial joint. hinge ball-and-socket pivot planar
ball-and-socket
From which plexus does the ulnar nerve arise? brachial cervical lumbar sacral thoracic
brachial
The deltoid muscle inserts on the ___________ of the humerus. head greater tubercle lesser tubercle deltoid tuberosity
deltoid tuberosity
When all rotator cuff muscles are activated at the same time they act to hold the head of the humerus in the _______________. glenoid cavity acetabulum coracoid process acromion
glenoid cavity
The ___________ is a rim of fibrocartilage that slightly deepens the glenoid cavity. glenoid labrum bursa coracoid process rotator cuff
glenoid labrum
The greater tubercle of the humerus is the point of insertion of which of the following muscles? infraspinatus deltoid subscapularis coracobrachialis
infraspinatus
What is the function of the rotator cuff? it anchors the humerus to the scapula it prevents over extension of the arm it reduces the movement of the shoulder it flexes the arm
it anchors the humerus to the scapula
Relative to the size of muscles, the term "maximus" means largest short longest flat
largest
Injury of which nerve could cause paralysis of the serratus anterior muscle? long thoracic dorsal scapular radial thoracodorsal
long thoracic
The pectoralis minor muscle inserts on the greater tubercle of the humerus. inserts on the acromion of the scapula. may originate from ribs 3 to 5. originates from the clavicle and sternum.
may originate from ribs 3 to 5.
The stability of the scapular joints is mostly provided by the ________ that attach to the scapula. ligaments muscles insertions bones
muscles
Which of the following is NOT a correct description of the location of the brachial plexus? on the neck alongside the first four cervical vertebrae passes above the first rib posterior to the clavicle extends inferiorly and laterally on either side of the last few cervical and first thoracic vertebrae enters the axilla
on the neck alongside the first four cervical vertebrae
Which of the following is not an action of the trapezius muscle? shrugging the shoulders (elevation of scapulae) extension of the head retraction of the scapulae protraction of the scapulae, i.e. a "boxer's punch"
protraction of the scapulae, i.e. a "boxer's punch"
The deltoid muscle is named according to: orientation of muscle fascicles relative to the body's midline. relative shape of the muscle. relative size of the muscle. location.
relative shape of the muscle.
Most of the strength in the shoulder joint comes from the ______________. articular capsule coracohumeral ligament rotator cuff muscles glenohumeral ligaments
rotator cuff muscles
Which of these muscles does not contribute to the rotator cuff? supraspinatus scalenes infraspinatus teres minor
scalenes
Which of the following nerves is NOT from the brachial plexus? musculocutaneous radial axillary sciatic ulnar
sciatic
Which muscle is called the "boxer's muscle" as it abducts the scapula and rotates it upward? It also elevates the ribs when the scapula is stabilized. trapezius serratus anterior levator scapulae rhomboid major
serratus anterior
Relative to the size of muscles, the term "brevis" means largest short longest flat
short
Which muscle originates at the first rib, near the sternum, and inserts on the inferior part of the clavicle? levator scapulae subclavius pectoralis minor rhomboid minor
subclavius
Which rotator cuff muscle originates on the subscapular fossa of the scapula and inserts on the lesser tubercle of the humerus? teres minor subscapularis infraspinatus supraspinatus
subscapularis
Which of the following is NOT a rotator cuff muscle? subscapularis supraspinatus teres minor teres major
teres major
Which muscle originates on the occipital bone and spines of C7-T12 and inserts on the clavicle and acromion of the scapula? levator scapulae serratus anterior trapezius pectoralis minor
trapezius
Which of the following pairs of terms does not correctly match muscle with innervation? subclavius; subclavian nerve rhomboid major; dorsal scapular nerve serratus anterior; long thoracic nerve trapezius; median pectoral nerve
trapezius; median pectoral nerve
