Lab Exercise 6: Shoulder and Upper Arm

Question 1

The muscle group of the upper back that originates on cervical vertebra 7 and thoracic vertebrae 1-5 and acts to adduct the scapula is the

Answer 1

rhomboideus group

Question 2

A(n) ____ is a rounded process of a bone located at an articulation site. This feature of the humerus rests in a depression called the ________ of the scapula.

Answer 2

head, glenoid cavity or fossa

Question 3

The muscle of the shoulder that originates on the posterior surface of the scapula above the spine is the

Answer 3

supraspinatus

Question 4

The spine of the scapula forms a large lateral projection called the

Answer 4

acromion process

Question 5

The muscle of the upper back and neck that originates on the occipital bone and the cervical and thoracic vertebrae which acts to shrug the shoulders and rotate the scapula is the

Answer 5

trapezius

Question 6

The feature on the anterior, lateral region of the scapula is called the

Answer 6

coracoid process

Question 7

The muscle of the chest that originates on the first 8-9 ribs and acts to rotate the scapula forward is the

Answer 7

serratus anterior

Question 8

The medial end of the clavicle is also called the ______ and the lateral end of the clavicle is also called the _______

Answer 8

sternal end, acromial end

Question 9

The muscle of the upper back and neck that inserts on the superior border of the scapula and acts to elevate the scapula is the

Answer 9

levator scapulae

Question 10

The lateral border of the scapula is also called the _____ and the medial border of the scapula is also called the _____

Answer 10

axillary border, vertebral border

Question 11

The deep muscle of the chest that originates on ribs 3-5 and inserts on the coracoid process of the scapula is the

Answer 11

pectoralis minor

Question 12

The raised area in the middle of the diaphysis of the humerus is called the

Answer 12

deltoid tuberosity

Question 13

The muscle of the shoulder which originates on the clavicle and scapula and acts to abduct, flex, and
extend the upper arm is the

Answer 13

deltoid

Question 14

Small, knob-like processes on bones are called tubercles. On the humerus these are found just distal to the neck of the humerus and are called the

Answer 14

greater and lesser tubercles

Question 15

The muscle of the shoulder that originates on the coracoid process of the scapula and inserts on the shaft of the humerus is the

Answer 15

coracobrachialis

Question 16

The ________ fossa is on the anterior surface of the scapula. The_____ fossa and ______ fossa are on the posterior surface of the scapula.

Answer 16

subscapular, supraspinous, infraspinous

Question 17

The superficial muscle of the chest that inserts on the intertubercular groove of the humerus and adducts the upper arm is the

Answer 17

pectoralis major

Question 18

Moving a body part such that its end following a circular bath is called _____ This motion is possible at condylar and ball and socket joints only.

Answer 18

circumduction

Question 19

The large muscle of the back that inserts on the intertubercular groove of the humerus and acts to extend and adduct the upper arm is the

Answer 19

latissimus dorsi

Question 20

When classified according to shape, the humerus is an example of a

Answer 20

long bone

Question 21

The muscle of the shoulder that originates on the posterior surface of the scapula below the spine is the

Answer 21

infraspinatus

Question 22

Moving a body part away from the midline of the body is called_____ while
moving that body part back toward the midline of the body is called______.
This motion is possible at the ______ joint formed between the humerus and scapula.

Answer 22

abduction, adduction, ball and socket

Question 23

The muscle that originates on the anterior surface of the scapula and acts to rotate the upper arm medially is the

Answer 23

subscapularis

Question 24

All muscles that rotate the upper arm laterally insert on the_____ tubercle,
whereas all muscles that rotate the upper arm medially insert on either the _____ tubercle or on the _____Therefore, the teres ______muscle inserts on the greater tubercle and the teres ____ muscle inserts on the lesser
tubercle.

Answer 24

greater, lesser, intertubercular groove, minor, major

Question 25

origin and insertion of coracobrachialis

Answer 25

origin: coracoid process of scapula
insertion: medial surface of humerus

Question 26

action of the coracobrachialis

Answer 26

flexes, adducts upper arm; rotates upper arm medially

Question 27

origin and insertion of the deltiod

Answer 27

origin: acromion process and spine of the scapula, clavicle
insertion: deltoid tuberosity of humerus

Question 28

action of the deltoid

Answer 28

abducts, flexes, extends upper arm

Question 29

origin and insertion of the infraspinatus

Answer 29

origin: infraspinous fossa
insertion: greater tubercle of humerous

Question 30

action of the infraspinatus

Answer 30

extends upper arm, rotates upper arm laterally

Question 31

origin and insertion of latissimus dorsi

Answer 31

origin: spinous processes of lower 6T, all L and S vertebrae, iliac crest, ribs
insertion: intertubercular sulcus of humerous

Question 32

action of the latissimus dorsi

Answer 32

adducts upper arm; rotates arm medially extends, depresses, retracts shoulder

Question 33

origin and insertion of the levator scapulae

Answer 33

origin: transverse processes of C1-C4
insertion: superior medial border of scapula

Question 34

action of the levator scapulae

Answer 34

elevates scapula

Question 35

origin and insertion of the pectoralis major

Answer 35

origin: clavicle, sternum, and ribs 2-6
insertion : intertubercular sulcus of humerous

Question 36

action of the pectoralis major

Answer 36

flexes shoulder, adducts upper arm; rotates upper arm medially

Question 37

origin and insertion of the pectoralis minor

Answer 37

origin: sternal end of ribs 3-5
insertion: coracoid process of scapula

Question 38

action of the pectoralis minor

Answer 38

depresses and protracts scapula; elevates ribs during forceful breathing

Question 39

m