Exercises 8 and 10 Muscles and Action/Innerv Trunk Human Anatomy

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1

Muscle group action

Posterior Mm attaching upper extremity to trunk - posterior side

Elevate scapula; depress scapula; rotate scapula upwards; rotate scapula downwards; portract scapula; retract scapula

Adduct shoulder; extend shoulder; medially rotate shoulder

2

Muscle group action

Shoulder joint - Scapular Mm

Laterally rotate shoulder; medially rotate shoulder; abduct shoulder; adduct shoulder

3

Muscle group action

Anterior Mm attaching upper extremity to trunk

Flex shoulder; adduct shoulder; medically rotate shoulder; protract scapula; retract scapula

4

Muscle group action

Abdominal muscle groups

Compress the abdomen. They also flex, laterally flex, and rotate the vertebral column.

5

External intercostals - action

Expand ribcage

6

External intercostals - innerv

Intercostal N

7

Internal intercostal - action

Compress ribcage

8

Internal intercostal - innerv

Intercostal N

9

Diaphragm - Action

Increases thoracic volume

10

Diaphragm - Innerv

Phrenic N

11

Rectus abdominis - action

Flexes lumbar vertebrae and compresses abdomen (compresses ribcage too)

12

Transversus abdominis - action

Flex lumbar vertebrae; laterally flex lumbar vertebrae; compress abdomen (to expel contents & push on lungs)

13

External oblique - action

Rotate lumbar vertebrae; flex lumbar vertebrae; laterally flex lumbar

14

Internal oblique - action

Vertebrae; compress abdomen (to expel contents & push on lungs)

15

Internal oblique - innerv

T7-T12 intercostal Nn & L1

16

Trapezius - action

Elevates scapula; depresses scapula; retracts scapula; rotates scapula up

17

Trapezius - innerv

Spinal accessory N (plus 3rd and 4th cervical Nn)

18

Latissimus dorsi - action

Adducts shoulder; extends shoulder; medially rotates shoulder

19

Subscapularis - action

Medially rotates shoulder; adducts shoulder

20

Subscapularis - innerv

(upper and lower subscapular N)

21

Supraspinatus - action

Abducts shoulder (also lat. rotates shoulder)

22

Supraspinatus - Innerv

(suprascapular N)

23

Infraspinatus - action

Laterally rotates shoulder, extends shoulder

24

Infraspinatus - innerv

(suprascapular N)

25

Teres minor - action

Lat. rotates shoulder, extends shoulder (adducts shoulder)

26

Teres minor - innerv

(Axillary N)

27

Teres major - action

Adducts, extends, & medially rotates shoulder

28

Teres major - innerv

(lower subscapular N)

29

Deltoid - action

Abducts, flexes, & extends shoulder

30

Deltoid - Innerv

Axillary N

31

Serratus anterior - action

Protracts scapula; rotates scapula up

32

Serratus anterior - innerv

(long thoracic N)

33

Pectoralis minor - action

Protracts scapula (rotates scapula down; i/o elevates ribs)

34

Pectoralis minor - innerv

(Med. Pectoral N)

35

Pectoralis major - action

Flexes shoulder; adducts shoulder; medially rotates shoulder

36

Pectoralis major - innerv

(lat. & med. pectoral Nn)