ch 10- shoulder joint bony landmarks and muscles

Question 1

what motion is occuring?

Answer 1

shoulder flexion: 0 to 180 degrees; sagittal plane around frontal axis

Question 2

what motion is occuring?

Answer 2

shoulder hyperextension: 45 degrees from anatomical position; sagittal plane around frontal axis

Question 3

what motion is occuring?

Answer 3

shoulder abduction: frontal plane around sagittal axis with 180 degrees of motion

Question 4

what motion is occuring?

Answer 4

shoulder adduction: frontal plane around sagittal axis with 180 degrees of motion

Question 5

what motion is occuring?

Answer 5

circumduction: combination of all shoulder motions

Question 6

what motions are occuring?

Answer 6

medial and lateral rotation: transverse plane around vertical axis

Question 7

what motion is occuring?

Answer 7

shoulder horizontal abduction: transverse plane around vertical axis

Question 8

what motion is occuring?

Answer 8

shoulder horizontal adduction: occurs in transverse plane around vertical axis

Question 9

what motion is occuring?

Answer 9

scaption: occurs in scapular plane approximately 30 degrees forward of frontal plane

Question 10

what bony landmark is highlighted?

Answer 10

gelnoid fossa: shallow, egg-shaped socket on the superior end, lateral side: articulates with the humerus

Question 11

what deepens this bony landmark?

Answer 11

glenoid labrum: fibrocartilaginous ring attached to the rim of glenoid fossa, which deepens the articular cavity

Question 12

what bony landmark is colored?

Answer 12

supraspinous fossa: above the spine, providing attachment for the supraspinatus muscle

Question 13

what bony landmark is colored?

Answer 13

infraspinous fossa: below the spine, providing attachment for the infraspinatus muscle

Question 14

what bony landmark is colored?

Answer 14

subscapular fossa: includes most of the area on the anterior (costal) surface, providing attachment for the subscapularis muscle

Question 15

what bony landmark is highlighted?

Answer 15

axillary border: providing attachment for teres major and minor muscles

Question 16

what bony landmark is highlighted?

Answer 16

acromion process: broat, flat area on the superior lateral aspect, providing attachment for the middle deltoid muscle

Question 17

what bony landmark is highlighted?

Answer 17

head: semirounded proximal end; articulates with the scapula

Question 18

what bony landmark is highlighted?

Answer 18

anatomical neck: circumferential groove separating the head from the tubercle

Question 19

what bony landmark is highlighted?

Answer 19

surgical neck: slightly constricted area just below tubercles where the head meets the body

Question 20

what bony landmark is highlighted?

Answer 20

shaft: “body”; area between the surgical neck proximaly and wider distal end

Question 21

what bony landmark is highlighted

Answer 21

greater tubercle: large projection lateral to head and lesser tubercle, provides attachment for the supraspinatus, infraspinatus, and teres minor muscles

Question 22

what bony landmark is highlighted?

Answer 22

lesser tubercle: smaller projection on the anterior surface, medial to the greater tubercle; provides attachment for the subscapularis muscle

Question 23

what bony landmark is highlighted?

Answer 23

deltoid tuberosity: on the lateral side near the midpoint of the shaft, not usually a well defined landmark

Question 24

what bony landmark is highlighted?

Answer 24

bicipital groove: intertubercular groove: the longitudinal groove between the tubercles, containing the tend of the long head of the biceps

Question 25

what ligament is in red?

Answer 25

**coracohumeral ligament**: attaches from lateral side of the coracoid process and spans the joint anteriorly to the medial side of the greater tubercle; strengthens upper part of joint capsule

Question 26

what ligament is in blue?

Answer 26

glenohumeral ligaments: superior, middle and inferior; reinforce the anterior portion of capsule

Question 27

what is labeled 1?

Answer 27

subacromial bursa: lies between the acromion and coracoacromial ligament, between them and the joint capsule

Question 28

what is labeled 2?

Answer 28

subdeltoid bursa: large and located between the deltoid muscle and joint capsule

Question 29

what is circled?

Answer 29

**thoracolumbar fascia:** lumbar aponeurosis; superficial fibrous sheet that attaches to the spinous processes of the lower thoracic and lumbar vertebrae, the supraspinal ligament, and the posterior part of the iliac crest, covering the sacrospinalis muscle; provides a very broad attachemnt for the latissimus dorsi muscle

Question 30

what muscle is highlighted and line of pull?

Answer 30

anterior deltoid; horizontal line of pull

Question 31

what is the green muscle and line of pull?

Answer 31

middle deltoid; vertical

Question 32

what is the blue muscle and line of pull?

Answer 32

posterior deltoid; oblique, horizontal line of pull

Question 33

what muscle is highlighted and line of pull?

Answer 33

pectoralis major; clavicular portion: vertical line of pull in extendsion and horizontal line of pull at shoulder level; sternal portion: vertical line of pull in flexion

Question 34

what muscle is highlighted and line of pull?

Answer 34

latissimus dorsi;

Question 35

what muscle is highlighted and line of pull?

Answer 35

teres major; horizontal

Question 36

what muscle is highlighted and line of pull?

Answer 36

supraspinatus; horizontal

Question 37

what muscle is highlighted and line of pull?

Answer 37

teres minor; oblique and outward

Question 38

what muscle is highlighted and line of pull?

Answer 38

infraspinatus; horizontal

Question 39

what muscle is highlighted and line of pull?

Answer 39

subscapularis; horizontal

Question 40

what muscle is highlighted and line of pull?

Answer 40

coracobrachialis; vertical