Pectoral region/axioappendicular Flashcards Preview

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Flashcards in Pectoral region/axioappendicular Deck (24):
1

Posterior axioappendicular muscles

[all extrinsic muscles]
superficial =
superficial extrinsic muscles of back (trapezius and latissimus dorsi)
deep =
levator scapulae, rhomboid minor, and rhomboid major

2

Anterior axioappendicular muscles

pectoralis major
pectoralis minor
subclavius
serratus anterior

3

Attachments of pectoralis major

Proximal: anterior surface of medial half of clavicle / manubrium, anterior sternum, T1-T6 costal cartilages, external oblique aponeurosis
Distal: lateral lip of intertubercular sulcus of humerus

4

Action of pectoralis major

adducts, medially rotates, flexes (clavicular), extends humerus at shoulder (sternocostal), depresses/protracts/inferiorly rotates scapula

5

Blood supply of pectoralis major

pectoral branch of thoracoacromial artery

6

Innervation of pectoralis major

lateral and medial pectoral nerves
clavicular head (C5, C6)
sternocostal head (C7, C8, T1)

7

Attachments of pectoralis minor

Proximal: 3rd-5th ribs near costal cartilages
Distal: medial border and superior surface of coracoid process of scapula

8

Actions of pectoralis minor

depresses, protracts, and inferiorly rotates scapula

9

Blood supply of pectoralis minor

pectoral branch of thoracoacromial artery

10

Innervation of pectoralis minor

medial pectoral nerve (C8, T1)

11

Attachments of subclavius

Proximal: 1st rib and its costal cartilage
Distal: middle third of clavicle in subclavian groove

12

Actions of subclavius

assists in stabilizing and depressing clavicle

13

Blood supply of subclavius

clavicular branch of thoracoacromial artery

14

Innervation of subclavius

nerve to the subclavius (C5, C6)

15

Attachments of serratus anterior

Proximal: external surface of lateral parts of ribs 1-9
Distal: anterior surface of medial border of scapula

16

Actions of serratus anterior

protracts, depresses, and superiorly rotates scapula

antagonized by rhomboids!

17

Blood supply of serratus anterior

lateral thoracic artery, also a branch of thoracodorsal artery

18

Innervation of serratus anterior

long thoracic nerve (C5, C6, C7)

19

//Attachments of external obliques

Proximal: ribs 5-12
Distal: linea alba, pubic tubercle, and anterior half of iliac crest

20

//Actions of external obliques

compresses and supports abdominal viscera

21

//Innervation of external obliques

thoracoabdominal nerves (T7-T11) and subcostal nerve (T12)

22

//Attachments of rectus abdominis

Proximal: pubic symphysis and crest
Distal: xiphoid process and 5th-7th costal cartilages

23

//Actions of rectus abdominis

flexes trunk, compresses and supports abdominal viscera, and stabilizes pelvis

24

//Innervation of rectus abdominis

thoracoabdominal nerves (T6-T12)