Muscular SystemPart 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

© 2011 Pearson Education, Inc.Figure 10.11 1

An anterior view of the muscles that position the pectoral girdle

Muscles That Positionthe Pectoral Girdle

Trapezius

Levator scapulae

Subclavius

Pectoralis minor

Internal intercostals

External intercostals

Muscles That Positionthe Pectoral Girdle

Pectoralis minor(cut)

Serratus anterior

T12

Muscles that position pectoral girdle

© 2011 Pearson Education, Inc.Figure 10.11 2

A posterior view of the muscles that position the pectoral girdle

Superficial Dissection

Muscles ThatPosition thePectoral Girdle

Trapezius

Muscles ThatPosition thePectoral Girdle

Deep Dissection

Levator scapulae

Rhomboid minor

Rhomboid major

Serratus anterior

Scapula

T12 vertebra

Muscles that position pectoral girdle

© 2011 Pearson Education, Inc.

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.Figure 10.12 1

Superficial Dissection Deep Dissection

Muscles ThatMove the Arm

Muscles ThatMove the Arm

Ribs (cut)

Sternum

Clavicle

Vertebra T12

Deltoid

Pectoralis majorSubscapularis

Coracobrachialis

Teres major

An anterior view of themuscles that move thearm

Muscles that move the arm

© 2011 Pearson Education, Inc.

Muscles that move the 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

Animation: Appendicular Muscles: Arm

© 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 Minor

A&P Flix: Teres Major

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.Figure 10.12 2

Superficial Dissection Deep Dissection

Muscles ThatMove the Arm

Muscles ThatMove the Arm

Vertebra T1

Thoracolumbar fascia

Supraspinatus

Deltoid

Latissimus dorsi

A posterior view of themuscles that move thearm

Supraspinatus

Teres major

Teres minor

Infraspinatus

Muscles that move the arm

© 2011 Pearson Education, Inc.Figure 10.12 4

The actions of muscles that position the arm

ExtensionAbduction

Flexion

Lateral rotation

Adduction

Medial rotation

Teres minor

Deltoid Tendons ofbiceps brachii

Subscapularis

Tricepsbrachii

Teresmajor

ANTERIORPOSTERIOR

GLENOIDCAVITY

Muscles that move the arm

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Figure 10.17a

Muscle Action of the Arm: Summary

The posterior extensor and anterior flexor muscles are shown

© 2011 Pearson Education, Inc.Figure 10.13 1

A posterior view showing the superficial layerof muscles involved in extension at the elbowand wrist

Wrist Extensors

Elbow Extensors

Triceps brachii

Anconeus

Extensor carpi ulnaris

Extensor carpi radialislongus

Extensor carpi radialisbrevis

Extensorretinaculum

Flexor carpiulnaris

Olecranonof ulna

Ulna

Radius

Muscles that move forearm and hand

© 2011 Pearson Education, Inc.

Muscles that move 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

Animation: Appendicular Muscles: Forearm and Hand

© 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.Figure 10.13 2

An anterior view showing the superficial musclesinvolved in flexion at the elbow and wrist

Elbow Flexors

Wrist Flexors

Elbow Extensors

Pronators andSupinators

Biceps brachii

Brachialis

Brachioradialis

Flexor carpi radialis

Palmaris longus

Flexor carpi ulnaris

Triceps brachii

Pronator teres

Supinator

Pronatorquadratus

Flexor retinaculum

Medial epicondyleof humerus

Humerus

Coracoid processof scapula

Muscles that move forearm and hand

© 2011 Pearson Education, Inc.Figure 10.13 4

Median nerve Flexor retinaculum

Synovial tendon sheaths

Carpal tunnel

Pisiform

Triquetrum

Lunate

Scaphold

Carpalbones

A cross section of the right wrist (palm up) showing the synovialtendon sheaths and nearby structure

Muscles that move forearm and hand

© 2011 Pearson Education, Inc.Figure 10.14 1 – 2

Tendon ofbiceps brachii

Anterior View,Middle Layer

Anterior View,Deepest Layer

Two anterior views of the muscles that move the hand and fingers

Brachioradialis(retracted)

Median nerve

Brachial arteryRadiusFlexor carpi ulnaris(retracted)

Supinator Cut tendons offlexor digitorumsuperficialis

Muscles That Flex theFingers and Thumb

Flexor digitorum superficialis

Flexor digitorum profundus

Flexor pollicis longus

MEDIALLATERAL

Muscles that move hand and fingers

© 2011 Pearson Education, Inc.

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.Figure 10.14 3 – 4

Two posterior views of the muscles that move the hand and fingers

Muscles ThatExtend the Fingers

Muscles That Movethe Thumb

Posterior View,Middle Layer

Posterior View,Deepest Layer

MEDIAL LATERAL

Anconeus

Extensor digitorum

Extensor digiti minimi

Abductor pollicis longus

Extensor pollicis brevis

Tendon of extensorpollicis longus

Anconeus

Supinator

Abductor pollicis longus

Extensor pollicis longus

Extensor pollicis brevisExtensorindicis

Tendon of extensordigiti minimi (cut)

Tendon of extensordigitorum (cut)

Radius

Ulna

Muscles that move hand and fingers

Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Figure 10.17b

Muscle Action of the Forearm: Summary Posterior extensors of the wrist and fingers, and

anterior flexor muscles are shown