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Anatomy > Chest Musculature > Flashcards

Chest Musculature Flashcards

1
Q

Pectoralis Major Prox and Distal attachment

A

Proximal: Medial clavical, Sternum, Costal cartilages 1-6, Rectus sheath

Distal: greater tuberosity of the humerus

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2
Q

Pectoralis minor prox and dist attachment

A

Prox: Ribs 3-5

Distal: Coracoid process (scapula)

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3
Q

Subclavius prox and distal attachment

A

Proximal: 1st rib

Distal: inferior clavicle

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4
Q

Pec Major Action

A

Adduction; medial rotation; flexion; respiratory assistance when shoulder is fixed

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5
Q

Pec Minor Action

A

Draws scap downward; rotates glenoid inferiorly; assists in respirateion

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6
Q

Subclavius action

A

Steadies sternoclavian joint

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7
Q

Pec Major innervation

A

Medial and lateral pectoral nn (C8, T1 med) (C5-7 lat)

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8
Q

Pec minor innervation

A

Medial pectoral nerve (C8, T1)

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9
Q

Subclavius innervation

A

Nerve to subclavius (C5,C6)

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10
Q

Pec major supply

A

Thoracoacromial a. (Pectoral branch), lateral thoracic a.

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11
Q

Pec minor supply

A

Thoracoacromial a. (Pectoral branch), and lateral thoracic a.

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12
Q

Subclavian supply

A

Thoracoacromial a. (Clavicular br.)

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13
Q

External intercostal prox/dist attachment

A

Prox: courses inferioanteriorly from rib’s tubercle to costochondral joint

Dist: ditto

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14
Q

Internal intercostal prox/dist attach

A

Prox and distal: courses supers-anteriorly from costal angle to sternum

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15
Q

Innermost intercostal prox and dist

A

From lower margin of rib to inner surface of ribs 2-3 below (fibers blend with innermost costal)

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16
Q

Transverse thoracis prox and dist

A

Inner surface of the sternum

17
Q

Ext. intercostal action

A

Elevation of ribs (inspiration)

18
Q

Int. Intercostal action

A

Interosseous component: depresses ribs during expiration

Interchondral component: elevates costal cartilages during inspiration

19
Q

Innermost intercostal action

A

Depresses ribs during expiration

20
Q

Subcostal action

A

Depresses ribs during expiration

21
Q

Transversus thoracis

A

Weakly depresses ribs during expiration

22
Q

Ext. intercostal innervation

A

Intercostal nerves 1-11 (ant rami thoracic spinal nn.)

23
Q

Int. Intercostal innervation

A

Intercostal nerves 1-11 (ant rami of thoracic nn)

24
Q

Innermost intercostal innervation

A

12 thoracic nn.

25
Q

Transversus thoracis innervation

A

2-6 thoracic spinal nn.

26
Q

Ext. intercostal supply

A

Intercostal aa.

27
Q

Int. Intercostal supply

A

Intercostal aa.

28
Q

Innermost intercostal supply

A

Intercostal aa.

29
Q

Subcostal supply

A

Subcostal a.

30
Q

Transversus thoracis supply

A

Intercostal aa.

Anatomy (8 decks)

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