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Muscles > Chest/Torso > Flashcards

Chest/Torso Flashcards

1
Q

serratus posterior inferior: Origin

A

vertebrae T11 - L3

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2
Q

serratus posterior inferior: Insertion

A

the inferior borders of the 9th through 12th ribs

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3
Q

serratus posterior inferior: Nerve

A

intercostal nerves

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4
Q

serratus posterior inferior: Action

A

depress the lower ribs, aiding in expiration

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5
Q

serratus posterior superior: Origin

A

nuchal ligament (or ligamentum nuchae) and the spinous processes of the vertebrae C7 through T3

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6
Q

serratus posterior superior: Insertion

A

the upper borders of the 2nd through 5th ribs

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7
Q

serratus posterior superior: Nerve

A

2nd through 5th intercostal nerves

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8
Q

serratus posterior superior: Action

A

elevate the ribs which aids in inspiration

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9
Q

external oblique: Origin

A

Lower 8 costae

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10
Q

external oblique: Insertion

A

Crista iliaca, ligamentum inguinale

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11
Q

external oblique: Nerve

A

intercostal nerves T5, T6, T7, T8, T9, T10, T11, subcostal nerve (T12)

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12
Q

external oblique: Action

A

Rotates torso

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13
Q

internal oblique: Origin

A

inguinal ligament, iliac crest and the lumbodorsal fascia

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14
Q

internal oblique: Insertion

A

linea alba, xyphoid process and the inferior ribs.

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15
Q

internal oblique: Nerve

A

intercostal nerves T8, T9, T10, T11, subcostal nerve (T12), iliohypogastric nerve, ilioinguinal nerve

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16
Q

internal oblique: Action

A

Compresses abdomen and rotates vertebral column.

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17
Q

transversus abdominis: Origin

A

ribs and the iliac crest

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18
Q

transversus abdominis: Insertion

A

inserts into the pubic tubercle via the conjoint tendon, also known as the falx inguinalis

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19
Q

transversus abdominis: Nerve

A

intercostal nerves T7, T8, T9, T10, T11, subcostal nerve (T12), iliohypogastric nerve, ilioinguinal nerve, genitofemoral nerve

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20
Q

transversus abdominis: Action

A

compress the ribs and viscera, providing thoracic and pelvic stability

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21
Q

rectus abdominis*: Origin

22
Q

rectus abdominis*: Insertion

A

costal cartilages of ribs 5-7, xiphoid process of sternum

23
Q

rectus abdominis*: Nerve

A

segmentally by thoraco-abdominal nerves (T7, T8, T9, T10, T11, T12)

24
Q

rectus abdominis*: Action

A

flexion of trunk/lumbar vertebrae

25
Q

quadratus lumborum: Origin

A

iliac crest and iliolumbar ligament

26
Q

quadratus lumborum: Insertion

A

last rib and transverse processes of lumbar vertebrae

27
Q

quadratus lumborum: Nerve

A

anterior branches of T12, L1, L2, L3, L4

28
Q

quadratus lumborum: Action

A

Alone, lateral flexion of vertebral column; Together, depression of thoracic rib cage

29
Q

Pectoralis major*: Origin

A

anterior surface of the medial half of the clavicle.

Sternocostal head: anterior surface of the sternum, the superior six costal cartilages

30
Q

Pectoralis major*: Insertion

A

intertubercular groove of the humerus

31
Q

Pectoralis major*: Nerve

A

lateral pectoral nerve and medial pectoral nerve
Clavicular head: C5 and C6
Sternocostal head: C7, C8 and T1

32
Q

Pectoralis major*: Action

A

Clavicular head: flexes the humerus
Sternocostal head: extends the humerus
As a whole, adducts and medially rotates the humerus. It also draws the scapula anteriorly and inferiorly.

33
Q

pectoralis minor*:Origin

A

3rd to 5th ribs, near their costal cartilages

34
Q

pectoralis minor*: Insertion

A

medial border and superior surface of the coracoid process of the scapula

35
Q

pectoralis minor*: Nerve

A

Medial pectoral nerves (C8, T1)

36
Q

pectoralis minor*: Action

A

stabilizes the scapula by drawing it inferiorly and anteriorly against the thoracic wall

37
Q

subclavius: Origin

38
Q

subclavius: Insertion

A

subclavian groove of clavicle

39
Q

subclavius: Nerve

A

nerve to subclavius

40
Q

subclavius: Action

A

Depresses the clavicle

41
Q

serratus anterior: Origin

A

fleshy slips from the outer surface of upper 8 or 9 ribs

42
Q

serratus anterior: Insertion

A

costal aspect of medial margin of the scapula

43
Q

serratus anterior: Nerve

A

long thoracic nerve (from roots of brachial plexus C5, C6, C7)

44
Q

serratus anterior: Action

A

protract and stabilize scapula, assists in upward rotation

45
Q

internal intercostales: Origin

A

rib - inferior border

46
Q

internal intercostales: Insertion

A

rib - superior border

47
Q

internal intercostales: Nerve

A

intercostal nerves

48
Q

internal intercostales: Action

A

hold ribs steady

49
Q

external intercostales: Origin

50
Q

external intercostales: Insertion

51
Q

external intercostales: Nerve

A

ntercostal nerves

52
Q

external intercostales: Action

A

??? nothing listed for this

Muscles (11 decks)

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