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Muscular System
Part C
Prepared by Alexander Cheroske and W. Rose.
Figures from Martini et al., Visual A&P.
Muscles with light gray labels will not be on test.
Portions copyright Pearson Education
Muscles that position pectoral girdle
An anterior view of the muscles that position the pectoral girdle
Muscles That Position
the Pectoral Girdle
Trapezius
Levator scapulae
Muscles That Position
the Pectoral Girdle
Subclavius
Pectoralis minor
Pectoralis minor
(cut)
Serratus anterior
Internal intercostals
External intercostals
T12
Figure 10.11
© 2011 Pearson Education, Inc.
1
Muscles that position pectoral girdle
A posterior view of the muscles that position the pectoral girdle
Superficial Dissection
Deep Dissection
Muscles That
Position the
Pectoral Girdle
Muscles That
Position the
Pectoral Girdle
Levator scapulae
Trapezius
Rhomboid minor
Rhomboid major
Scapula
Serratus anterior
T12 vertebra
Figure 10.11
© 2011 Pearson Education, Inc.
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Muscles that position pectoral girdle
(all on Muscles_to_know.doc)
A&P Flix: Trapezius
A&P Flix: Levator Scapula
A&P Flix: Serratus Anterior
A&P Flix: Rhomboid Minor
A&P Flix: Rhomboid Major
A&P Flix: Overview of Muscles Acting on
Shoulder Joint and Humerus
Animation: Muscles of Pectoral Girdle
A&P Flix: Movement of Pectoral Girdle
© 2011 Pearson Education, Inc.
Muscles that move the arm
Deep Dissection
Superficial Dissection
Sternum
Clavicle
Muscles That
Move the Arm
Deltoid
Pectoralis major
Ribs (cut)
Muscles That
Move the Arm
Subscapularis
Coracobrachialis
Teres major
An anterior view of the
muscles that move the
arm
Vertebra T12
Figure 10.12
© 2011 Pearson Education, Inc.
1
Muscles that move the arm
Animation: Appendicular Muscles: Arm
A&P Flix: Rotator Cuff Muscles: An Overview
A&P Flix: Rotator Cuff Muscles
A&P Flix: Movement from the Rotator Cuff Muscles
A&P Flix: Muscles that Cross Glenohumeral Joint
© 2011 Pearson Education, Inc.
Muscles that move the arm
A&P Flix: Latissimus Dorsi
A&P Flix: Supraspinatus
A&P Flix: Infraspinatus
A&P Flix: Teres Major
A&P Flix: Teres Minor
A&P Flix: Subscapularis
A&P Flix: Pectoralis Major
A&P Flix: Pectoralis Minor
A&P Flix: Deltoid
© 2011 Pearson Education, Inc.
Muscles that move the arm
A&P Flix: Scapular Muscles of the
Glenohumeral Joint
A&P Flix: Axial Muscles of the
Glenohumeral Joint
A&P Flix: Movement at the Glenohumeral
Joint: An Overview
A&P Flix: Movement at the Glenohumeral
Joint
© 2011 Pearson Education, Inc.
Muscles that move the arm
Superficial Dissection
Muscles That
Move the Arm
Vertebra T1
Supraspinatus
Deltoid
Latissimus dorsi
Deep Dissection
Muscles That
Move the Arm
Supraspinatus
Infraspinatus
Teres minor
Teres major
Thoracolumbar fascia
A posterior view of the
muscles that move the
arm
Figure 10.12
© 2011 Pearson Education, Inc.
2
Muscles
that move
the arm
The actions of muscles that position the arm
Abduction
Extension
Flexion
Deltoid
POSTERIOR
GLENOID
CAVITY
Tendons of
biceps brachii
ANTERIOR
Teres minor
Subscapularis
Triceps
brachii
Lateral rotation
Teres
major
Adduction
© 2011 Pearson Education, Inc.
Medial rotation
Figure 10.12
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Muscle Action of the Arm: Summary

The posterior extensor and anterior flexor muscles
are shown
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 10.17a
Muscles that
move forearm
and hand
A posterior view showing the superficial layer
of muscles involved in extension at the elbow
and wrist
Elbow Extensors
Triceps brachii
Anconeus
Wrist Extensors
Extensor carpi ulnaris
Olecranon
of ulna
Flexor carpi
ulnaris
Extensor carpi radialis
longus
Extensor carpi radialis
brevis
Radius
Ulna
Extensor
retinaculum
Figure 10.13
© 2011 Pearson Education, Inc.
1
Muscles that move forearm and hand
Animation: Appendicular Muscles: Forearm and Hand
A&P Flix: The Elbow Joint and Forearm: An Overview
A&P Flix: Muscles of the Elbow Joint
A&P Flix: Movement at the Elbow Joint
A&P Flix: Muscles of the Forearm
© 2011 Pearson Education, Inc.
Muscles that move forearm and hand
A&P Flix: Biceps Brachii
A&P Flix: Brachialis
A&P Flix: Triceps Brachii
A&P Flix: Pronator Teres
A&P Flix: Brachioradialis
© 2011 Pearson Education, Inc.
Muscles that move forearm and hand
A&P Flix: Supinator
A&P Flix: Flexor Digitorum Superficialis
A&P Flix: Flexor Carpi Radialis
A&P Flix: Flexor Carpi Ulnaris
A&P Flix: Extensor Digitorum
A&P Flix: Extensor Carpi Radialis Longus
A&P Flix: Extensor Carpi Radialis Brevis
A&P Flix: Extensor Carpi Ulnaris
© 2011 Pearson Education, Inc.
Muscles that
move forearm
and hand
An anterior view showing the superficial muscles
involved in flexion at the elbow and wrist
Coracoid process
of scapula
Humerus
Elbow Flexors
Biceps brachii
Elbow Extensors
Triceps brachii
Brachialis
Brachioradialis
Medial epicondyle
of humerus
Wrist Flexors
Flexor carpi radialis
Palmaris longus
Flexor carpi ulnaris
Pronators and
Supinators
Pronator teres
Supinator
Pronator
quadratus
Flexor retinaculum
Figure 10.13
© 2011 Pearson Education, Inc.
2
Muscles that move forearm and hand
A cross section of the right wrist (palm up) showing the synovial
tendon sheaths and nearby structure
Median nerve
Flexor retinaculum
Synovial tendon sheaths
Carpal tunnel
Pisiform
Triquetrum
Lunate
Carpal
bones
Scaphold
Figure 10.13
© 2011 Pearson Education, Inc.
4
Muscles that move hand and fingers
Two anterior views of the muscles that move the hand and fingers
Median nerve
Tendon of
biceps brachii
Brachial artery
Radius
Flexor carpi ulnaris
(retracted)
Brachioradialis
(retracted)
Supinator
Cut tendons of
flexor digitorum
superficialis
Muscles That Flex the
Fingers and Thumb
Flexor digitorum superficialis
Flexor digitorum profundus
Flexor pollicis longus
LATERAL
MEDIAL
Anterior View,
Middle Layer
Anterior View,
Deepest Layer
Figure 10.14
© 2011 Pearson Education, Inc.
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–
2
Muscles that move hand and fingers
A&P Flix: Muscles that Act on the Wrist and Fingers:
An Overview
A&P Flix: Anterior Muscles of the Wrist and Fingers
A&P Flix: Posterior Muscles of the Wrist and Fingers
A&P Flix: Carpal Tunnel
A&P Flix: Movements of the Wrist and Fingers
© 2011 Pearson Education, Inc.
Muscles that move hand and fingers
Two posterior views of the muscles that move the hand and fingers
Anconeus
Anconeus
Muscles That
Extend the Fingers
Supinator
Extensor digitorum
Muscles That Move
the Thumb
Extensor digiti minimi
Abductor pollicis longus
Extensor pollicis longus
Abductor pollicis longus
Extensor pollicis brevis
Tendon of extensor
pollicis longus
Extensor
indicis
Ulna
Tendon of extensor
digiti minimi (cut)
MEDIAL
Posterior View,
Middle Layer
LATERAL
Extensor pollicis brevis
Radius
Tendon of extensor
digitorum (cut)
Posterior View,
Deepest Layer
Figure 10.14
© 2011 Pearson Education, Inc.
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–
4
Muscle Action of the Forearm: Summary
 Posterior extensors of the wrist and fingers, and
anterior flexor muscles are shown
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 10.17b