Pectoral region/axioappendicular Flashcards

1
Q

Posterior axioappendicular muscles

A

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

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2
Q

Anterior axioappendicular muscles

A

pectoralis major
pectoralis minor
subclavius
serratus anterior

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3
Q

Attachments of pectoralis major

A

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

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4
Q

Action of pectoralis major

A

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

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5
Q

Blood supply of pectoralis major

A

pectoral branch of thoracoacromial artery

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6
Q

Innervation of pectoralis major

A
lateral and medial pectoral nerves
clavicular head (C5, C6)
sternocostal head (C7, C8, T1)
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7
Q

Attachments of pectoralis minor

A

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

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8
Q

Actions of pectoralis minor

A

depresses, protracts, and inferiorly rotates scapula

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9
Q

Blood supply of pectoralis minor

A

pectoral branch of thoracoacromial artery

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10
Q

Innervation of pectoralis minor

A

medial pectoral nerve (C8, T1)

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11
Q

Attachments of subclavius

A

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

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12
Q

Actions of subclavius

A

assists in stabilizing and depressing clavicle

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13
Q

Blood supply of subclavius

A

clavicular branch of thoracoacromial artery

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14
Q

Innervation of subclavius

A

nerve to the subclavius (C5, C6)

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15
Q

Attachments of serratus anterior

A

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

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16
Q

Actions of serratus anterior

A

protracts, depresses, and superiorly rotates scapula

antagonized by rhomboids!

17
Q

Blood supply of serratus anterior

A

lateral thoracic artery, also a branch of thoracodorsal artery

18
Q

Innervation of serratus anterior

A

long thoracic nerve (C5, C6, C7)

19
Q

//Attachments of external obliques

A

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

20
Q

//Actions of external obliques

A

compresses and supports abdominal viscera

21
Q

//Innervation of external obliques

A

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

22
Q

//Attachments of rectus abdominis

A

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

23
Q

//Actions of rectus abdominis

A

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

24
Q

//Innervation of rectus abdominis

A

thoracoabdominal nerves (T6-T12)