Anatomy hw 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, 3, 6, 8, 5

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

3

A separated shoulder is an injury to the shoulder (glenohumeral joint).

False

The serratus anterior

abducts the scapula

What is the function of the rotator cuff?

anchor humerus to scapula

The shoulder (glenohumeral) joint is a ___________ synovial joint.

ball-and-socket

From which plexus does the ulnar nerve arise?

brachial

The deltoid muscle inserts on the ___________ of the humerus.

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

The ___________ is a rim of fibrocartilage that slightly deepens the glenoid cavity.

glenoid labrum

The greater tubercle of the humerus is the point of insertion of which of the following muscles?

infraspinatus

Relative to the size of muscles, the term "maximus" means

largest

Injury of which nerve could cause paralysis of the serratus anterior muscle?

long thoracic

The pectoralis minor muscle

may originate from ribs 3 to 5

The stability of the scapular joints is mostly provided by the ________ that attach to the scapula.

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

Which of the following is not an action of the trapezius muscle?

protraction of the scapulae, i.e. a "boxer's punch"

The deltoid muscle is named according to:

relative shape of muscle

Most of the strength in the shoulder joint comes from the ______________.

rotator cuff muscles

Which of these muscles does not contribute to the rotator cuff?

scalenes

Which of the following nerves is NOT from the brachial plexus?

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.

serrratus anterior

The trapezius muscle of the neck is named according to its:

shape

Relative to the size of muscles, the term "brevis" means

short

Which muscle originates at the first rib, near the sternum, and inserts on the inferior part of the clavicle?

subclavius

Which rotator cuff muscle originates on the subscapular fossa of the scapula and inserts on the lesser tubercle of the humerus?

subscapularis

Which of the following muscles make up the rotator cuff?

supraspinatus infraspinatus subscapularis

Which of the following is NOT a rotator cuff muscle?

teres major

Which muscle originates on the occipital bone and spines of C7-T12 and inserts on the clavicle and acromion of the scapula?

trapezius

Which of the following pairs of terms does not correctly match muscle with innervation?

trapezius; median pectoral nerve