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Reference Guide

Permachart - Marketing Reference Guide: Opponens Digiti Minimi Muscle Of Hand, Extensor Pollicis Brevis Muscle, Flexor Pollicis Longus Muscle

2 pages97 viewsFall 2015

Department
ANAT - Anatomy
Course Code
ANAT 14
Professor
All
Chapter
Permachart

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TM
permacharts
Muscular System:
Extremities
Muscular System:
Extremities
Figure 1: Anterior Muscles of the Arm, Forearm & Hand
Superficial Layer Superficial Layer
Intermediate Layer
Deep Layer Deep Layer
Deep Layer of Palm
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• All of the muscles of
the forearm and hand
can be classified as either
intrinsic or extrinsic
• Though most of these
muscles serve primarily
to move the hand,
intrinsic muscles have
both their origin and
insertion within the hand
(e.g., flexor pollicis
brevis), while extrinsic
muscles insert in the
hand but originate from
the arm or forearm (e.g.,
flexor pollicis longus)
• Similar relationships
can be found in other
parts of the body
• A muscle is classified as
a prime mover if it acts
directly to produce a
desired movement
• A synergist assists the
prime mover in
producing a movement,
while an antagonist
opposes the movement
Figure 2: Posterior Muscles of the Arm, Forearm & Hand
For example,
the biceps brachii
(prime mover)
flexes the
forearm, the
brachialis
(synergist) assists
in flexion, and the
triceps brachii
(antagonist)
opposes flexion
Muscles play
different roles for
different
movements
Figure 1: Anterior Muscles
of the Arm, Forearm & Hand
Superficial Layer
1Deltoid
2Biceps brachii
(short head)
3Biceps brachii
(long head)
4Bicipital aponeurosis
5Brachioradialis
6Pronator teres
7Extensor carpi radialis
longus
8Flexor carpi radialis
9Palmaris longus
10Flexor carpi ulnaris
11 Palmaris brevis
12 Abductor pollicis brevis
13Flexor pollicis brevis
(superficial head)
14Abductor digiti minimi
15 Flexor digiti minimi brevis
Intermediate Layer
16Subscapularis
17Coracobrachialis
18 Teres major
19Brachialis
20 Supinator
21 Flexor digitorum
superficialis
22 Opponens pollicis
23 Opponens digiti minimi
Deep Layer
24 Flexor digitorum profundus
25 Flexor pollicis longus
26 Lumbricals
Deep Layer of Palm
27 Pronator quadratus
28 Flexor pollicis brevis
(deep head)
29 Adductor pollicis
(oblique head)
30 Adductor pollicis
(transverse head)
31 Palmar interossei
Figure 2: Posterior Muscles
of the Arm, Forearm & Hand
Superficial Layer
1Supraspinatus
2Deltoid
3Infraspinatus
4Teres minor
5Teres major
6Triceps brachii
(long head)
7Triceps brachii
(lateral head)
8Anconeus
9Flexor carpi ulnaris
10 Extensor carpi ulnaris
11 Extensor digiti minimi
12 Extensor digitorum
Deep Layer
13 Triceps brachii
(medial head)
14 Extensor carpi
radialis longus
15 Extensor carpi
radialis brevis
16 Supinator
17 Abductor pollicis longus
18 Extensor pollicis longus
19 Extensor pollicis brevis
20 Extensor indicis
21 Abductor digiti minimi
22 Abductor pollicis brevis
23 Dorsal interossei
2nd EDITION
© 2002-2012 Mindsource Technologies Inc.
www.permacharts.com
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