muscles of trunk practical part 2

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Last updated 3:08 PM on 9/20/26

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27 Terms

1

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muscles that position the pectoral girdle: position and support the scapula and clavicle and help maintain the articulation between humerus and scapula

pectoralis minor, serratus anterior, subclavius, levator scapulae, rhomboid major, rhomboid minor, trapezius

<p>pectoralis minor, serratus anterior, subclavius, levator scapulae, rhomboid major, rhomboid minor, trapezius</p>

2

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<p>pectoralis minor</p>

pectoralis minor

O: ribs 3-5

I: coracoid process
A: protracts shoulder

<p>O: ribs 3-5</p><p>I: coracoid process<br>A: protracts shoulder</p>

3

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<p>serratus anterior</p>

serratus anterior

O: ribs 1-8

I: scapula
A: protracts shoulder

<p>O: ribs 1-8</p><p>I: scapula <br>A: protracts shoulder</p>

4

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<p>subclavius</p>

subclavius

O: 1st rib

I: clavicle
A: protracts shoulder

<p>O: 1st rib</p><p>I: clavicle <br>A: protracts shoulder</p>

5

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<p>levator scapulae </p>

levator scapulae

O: transverse processes C1-C4

I: scapula
A: elevate scapula

<p>O: transverse processes C1-C4</p><p>I: scapula <br>A: elevate scapula </p>

6

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<p>rhomboid major/minor</p>

rhomboid major/minor

O: spinous process of thoracic spine

I: scapula
A: downward rotation of shoulder

<p>O: spinous process of thoracic spine</p><p>I: scapula <br>A: downward rotation of shoulder</p>

7

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<p>trapezius</p>

trapezius

O: cervical and thoracic vertebrae

I: scapula and clavicle
A: elevate and adduct neck

<p>O: cervical and thoracic vertebrae</p><p>I: scapula and clavicle<br>A: elevate and adduct neck</p>

8

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muscles that move the arm at the shoulder

deltoid, latissimus dorsi, pectoralis major, supraspinatus, infraspinatus, subscapularis, teres minor, teres major

<p>deltoid, latissimus dorsi, pectoralis major, supraspinatus, infraspinatus, subscapularis, teres minor, teres major</p>

9

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rotator cuff

supraspinatus, infraspinatus, subscapularis, teres minor

<p>supraspinatus, infraspinatus, subscapularis, teres minor</p>

10

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<p>deltoid</p>

deltoid

O: scapula

I: humerus

A: adduction of the arm at the shoulder

<p>O: scapula</p><p>I: humerus</p><p>A: adduction of the arm at the shoulder</p>

11

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<p>latissimus dorsi</p>

latissimus dorsi

O: spinous processes

I: humerus

A: extension/adduction at shoulder

<p>O: spinous processes</p><p>I: humerus </p><p>A: extension/adduction at shoulder</p>

12

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<p>pectoralis major</p>

pectoralis major

O: ribs 3-5
I: humerus
A: adduction, flexion, medial rotation at the shoulder

<p>O: ribs 3-5<br>I: humerus<br>A: adduction, flexion, medial rotation at the shoulder</p>

13

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<p>supraspinatus</p>

supraspinatus

O: scapula (supraspinatus fossa)

I: humerus (greater tubercle)

A: abduction at the shoulder

<p>O: scapula (supraspinatus fossa)</p><p>I: humerus (greater tubercle)</p><p>A: abduction at the shoulder</p>

14

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<p>infraspinatus</p>

infraspinatus

O: scapula (infraspinatus fossa)

I: humerus (greater tubercle)

A: lateral rotation at the shoulder

<p>O: scapula (infraspinatus fossa)</p><p>I: humerus (greater tubercle)</p><p>A: lateral rotation at the shoulder</p>

15

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<p>subscapularis</p>

subscapularis

O: scapula (subscapular fossa)

I: humerus (intertubercular sulcus)

A: medial rotation at the shoulder

<p>O: scapula (subscapular fossa)</p><p>I: humerus (intertubercular sulcus)</p><p>A: medial rotation at the shoulder</p>

16

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<p>teres major</p>

teres major

O: scapula (medial border)

I: humerus (intertubercular groove)
A: medial rotation at the shoulder

<p>O: scapula (medial border)</p><p>I: humerus (intertubercular groove)<br>A: medial rotation at the shoulder</p>

17

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<p>teres minor</p>

teres minor

O: scapula (medial border)

I: humerus (greater tubercle)

A: lateral rotation at the shoulder

<p>O: scapula (medial border)</p><p>I: humerus (greater tubercle)</p><p>A: lateral rotation at the shoulder</p>

18

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muscles of the abdominal wall

external oblique, rectus abdominis, internal oblique, transversus abdominis

<p>external oblique, rectus abdominis, internal oblique, transversus abdominis</p>

19

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<p>external oblique</p>

external oblique

O: inferior ribs

I: ilium

A: compress abdomen

<p>O: inferior ribs</p><p>I: ilium </p><p>A: compress abdomen </p>

20

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<p>rectus abdominis</p>

rectus abdominis

O: pubis

I: costal cartilage

A: compress abdomen

<p>O: pubis </p><p>I: costal cartilage</p><p>A: compress abdomen</p>

21

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<p>internal oblique </p>

internal oblique

O: ilium

I: inferior ribs
A: compress abdomen

<p>O: ilium</p><p>I: inferior ribs<br>A: compress abdomen</p>

22

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<p>transverse abdominis </p>

transverse abdominis

I: ilium

O: pubis
A: compress abdomen

<p>I: ilium </p><p>O: pubis <br>A: compress abdomen</p>

23

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<p>splenius capitis</p>

splenius capitis

O: vertebrae C7-T6
I: vertebrae C2-C4
A: extension, rotation, lateral flexion of the neck

<p>O: vertebrae C7-T6<br>I: vertebrae C2-C4<br>A: extension, rotation, lateral flexion of the neck</p>

24

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muscles of the thorax

external intercostal muscles, internal intercostal muscles, diaphragm

<p>external intercostal muscles, internal intercostal muscles, diaphragm</p>

25

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<p>external intercostal muscles</p>

external intercostal muscles

O: inferior side of ribs

I: superior side of ribs

A: inhalation (elevate ribs)

<p>O: inferior side of ribs</p><p>I: superior side of ribs </p><p>A: inhalation (elevate ribs)</p>

26

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<p>internal intercostal muscles</p>

internal intercostal muscles

O: superior side of ribs

I: inferior side of ribs
A: exhalation (depresses ribs)

<p>O: superior side of ribs</p><p>I: inferior side of ribs <br>A: exhalation (depresses ribs)</p>

27

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<p>diaphragm</p>

diaphragm

O: xyphoid process, costal cartilage, anterior lumbar vertebrae

I: central tendinous sheet
A: enlarges thoracic cavity (inhalation), compresses thoracic cavity (exhalation)

<p>O: xyphoid process, costal cartilage, anterior lumbar vertebrae</p><p>I: central tendinous sheet <br>A: enlarges thoracic cavity (inhalation), compresses thoracic cavity (exhalation)</p>