Lab 3_ Shoulder_Part_2
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University of Ontario Institute of Technology *
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2465U
Subject
Anatomy
Date
Apr 3, 2024
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docx
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11
Uploaded by abethipan
PRE-LAB: Part One:
Know the following muscles, including their action,
origin and insertion on the skeleton. Use the following diagrams
1
Kine 2000U Anatomy of Human Movement
Lab 3: Shoulder Two and Elbow
Anterior view
Posterior view
Pectoralis major (sternal fibers)
supraspinatus
infraspinatus
teres minor
subscapularis
brachialis
coracobrachialis
biceps brachii (cut ends)
teres major
latissimus dorsi
thoracolumbar fascia
supraspinatus
pectoralis major (cut edge)
serratus anterior
pectoralis minor
pectoralis major (clavicular fibres)
List the muscles which make up the rotator cuff:
Subscapularis, teres minor,
supraspinatus, infraspinatus.
In lab, describe the origin, insertion and action of the rotator cuff muscles to your lab partner using the arm model.
Figure 1:
Anterior view
Use figures 1, 2 and 3 and write the name of the correct muscle next to the letter identifying it:
A. Supraspinatus
B. Subscapularis
C.
Pectoralis Major
D.
Teres Major
E.
Coracobrachialis
F.
Latissimus Dorsi
G.
Brachialis
H.
Pectoralis Minor
I.
Serratus Anterior
J.
Supraspinatus
2
Posterior view
Figure 2:
Figure 3: Anterior shoulder muscles
K.
Infraspinatus
L.
Teres Minor
M. Teres Major
N.
Thoracikumbar fascia
O. Latissimus Dorsi
P.
Teres Major
Q. Pectoralis Major
R.
Pectoralis Major
Fill in the blanks of the chart below for the glenohumeral muscles:
Movements
Muscles
Flexion
Pectoralis Major, Anterior Deltoid, Biceps brachii, coracobrachialis
Extension
Latissimus dorsi, Teres major, Pectoralis major (sternocostal fibres: extend
flexed humerus), Posterior deltoid
Medial Rotation
Subscapularis, teres major, latissimus dorsi, pectoralis major, anterior deltoid
Lateral rotation
Teres minor, Infraspinatus, posterior deltoid
Abduction
Supraspinatus, Deltoid, pectoralis major
Adduction
Coracobrachialis, pectoralis major, latissimus dorsi, teres major
3
Anterior elbow muscles superficial and deep: Indicate the name of the muscle identified by the each letter in the chart below:
A.
Biceps brachii
B. Brachialis
C.
Protractor teres
D. supinator
E. brachioradialis
4
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