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Musculoskeletal System > Muscles of Trunk > Flashcards

Muscles of Trunk Flashcards

1
Q

THE BREAST - BLOOD SUPPLY

A

LATERALLY:
- Thoraco-acromial
- Lateral thoracic
- Subscapular arteries
MEDIALLY:
- Internal thoracic artery branches
- 2nd to 4th Intercostal arteries via branches

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2
Q

THE BREAST - VENOUS DRAINAGE

A

Axillary
Internal thoracic
Intercostal veins

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3
Q

THE BREAST - INNERVATION

A

Anterior and Lateral Branches Intercostal Nerves T4-T6
Superiorly by Cutaneous Branches of Cervical Plexus C1-C4

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4
Q

THE BREAST - LYMPHATIC DRAINAGE

A

75% Axillary Nodes
25% Parasternal Nodes

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5
Q

EXTERNAL INTERCOSTAL (Origin)

A

Inferomedially…
INSPIRATION!!
Inferior margin ribs

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6
Q

EXTERNAL INTERCOSTAL (Insertion)

A

INSPIRATION!!
Superior margin ribs below

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7
Q

EXTERNAL INTERCOSTAL (Action)

A

INSPIRATION!!
Elevate ribs during forced inspiration

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8
Q

EXTERNAL INTERCOSTAL (Innervation)

A

INSPIRATION!!
Anterior Rami T1- T11

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9
Q

INTERNAL INTERCOSTAL (Origin)

A

Superomedially…
EXPIRATION!!
Superior margin ribs below

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10
Q

INTERNAL INTERCOSTAL (Insertion)

A

EXPIRATION!!
Inferior lateral edge of costal groove above

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11
Q

INTERNAL INTERCOSTAL (Action)

A

EXPIRATION!!
Depresses ribs during forced expiration

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12
Q

INTERNAL INTERCOSTAL (Innervation)

A

EXPIRATION!!
Anterior Rami T1- T11

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13
Q

INNERMOST INTERCOSTAL (Origin)

A

Superomedially…
Deep surface ribs below

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14
Q

INNERMOST INTERCOSTAL (Insertion)

A

Medial edge costal grooves

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15
Q

INNERMOST INTERCOSTAL (Action)

A

Depress ribs during forced expiration

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16
Q

INNERMOST INTERCOSTAL (Innervation)

A

Anterior Rami T1-T11

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17
Q

SUBCOSTALES

A

Internal surface of 1 rib to internal surface of 3 ribs below
Acts to depress ribs

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18
Q

TRANSVERSUS THORACIS (Origin)

A

Posterior aspect Xiphoid Process
Inferior aspect Sternum
Adjacent costal cartilages lower true ribs

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19
Q

TRANSVERSUS THORACIS (Insertion)

A

Lower border Costal Cartilages Rib 3-6

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20
Q

TRANSVERSUS THORACIS (Action)

A

Depresses costal cartilages

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21
Q

TRANSVERSUS THORACIS (Innervation)

A

Anterior Rami T1-T11

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22
Q

DIAPHRAGM - PERIPHERAL ORIGIN POINTS

A

Separates Thoracic cavity from Abdominal cavity
- Xiphoid Process of Sternum
- Costal Margin
- Ribs 11 and 12
- Ligaments across Posterior Abdominal Wall
- Vertebrae of Lumbar Region
Fibres converge to join Central Tendon

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23
Q

DIAPHRAGM -CRURA

A

Right Crus: L1-L3
Left Crus: L1-L2
~Crura Connected by tendinous arch = Median Arcuate Ligament
~L1/L2 and Transverse Process L1, Lateral to crura= Medial Arcuate Ligament
~L1 and Rib 12, covers Quadratus Lumborum = Lateral Arcuate Ligament

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24
Q

DIAPHRAGM - STRUCTURES PASSING THROUGH

A

AORTIC HIATUS - LEVEL T12
- Thoracic duct
- Azygos vein
- Median arcuate ligament
OESOPHAGEAL HIATUS - LEVEL T10
- Anterior/ Posterior vagal trunks
CAVAL OPENING - LEVEL T8
- Inferior Vena Cava
- Right Phrenic Nerve

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25
Q

DIAPHRAGM - DOMES

A

Dome appearance left and right side
Left dome= 5th intercostal space
Right dome= Rib 5

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26
Q

DIAPHRAGM - BLOOD SUPPLY

A

SUPERIOR surface:
~ Pericardiophrenic
~ Musculophrenic
~ Superior phrenic
INFERIOR surface:
~ Inferior phrenic

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27
Q

DIAPHRAGM - INNERVATION

A

Phrenic Nerve C3,C4, C5
(C3,4,5 keeps the Diaphragm alive)

28
Q

PSOAS MAJOR (Origin)

A

Body, Intervertebral Discs and Transverse Processes T12, L1- L5

29
Q

PSOAS MAJOR (Insertion)

A

Lesser trochanter Femur

30
Q

PSOAS MAJOR (Action)

A

Flex thigh at hip joint when trunk stabilized
Flex trunk when body supine

31
Q

PSOAS MAJOR (Innervation)

A

Anterior Rami L1-L3

32
Q

PSOAS MINOR (Origin)

A

Body T12 and L1

33
Q

PSOAS MINOR (Insertion)

A

Pectineal line and Illiopubic eminence

34
Q

PSOAS MINOR (Action)

A

Weak flexor Lumbar vertebral column

35
Q

PSOAS MINOR (Innervation)

A

Anterior Rami L1

36
Q

QUADRATUS LUMBORUMS (Origin)

A

Psoas Major Medially and Transversus Abdominus Laterally
- Transverse Process L5
- Iliac Crest
- lliolumbar Process

37
Q

QUADRATUS LUMBORUMS (Insertion)

A

Transverse Processes L1- L4
Inferior border Rib 12

38
Q

QUADRATUS LUMBORUMS (Action)

A

Depresses and Stabilizes Rib 12
Lateral bending of trunk
Both muscles together extend trunk

39
Q

QUADRATUS LUMBORUMS (Innervation)

A

Anterior Rami T12, L1-L4

40
Q

ILIACUS (Origin)

A

Psoas Major Medially and Transversus Abdominus Laterally
- Iliac fossa

41
Q

ILIACUS (Insertion)

A

Joins Psoas Major insert on Iesser trochanter Femur

42
Q

ILIACUS (Action)

A

Flexes thigh at hip joint
Flexes trunk when supine

43
Q

ILIACUS (Innervation)

A

Femoral Nerve

44
Q

SUPERFICIAL FASCIA

A
  1. SUPERFICIAL layer - Campers Fascia
    ~ continues over inguinal ligament
    ~ over penis as Dartos fascia in scrotum
    ~ retain fat in labia majora
    2.DEEP layer - Scarpa’s Fascia
    ~ little to no fat
    ~ continues into thigh
    ~ below inguinal ligament fuses with fascia lata
45
Q

EXTERNAL OBLIQUE (Origin)

A

Midline aponeurosis = LINEA ALBA
Fibers run inferomedially
- Lower six rib shafts (T7-T12)

46
Q

EXTERNAL OBLIQUE (Insertion)

A

Linea Alba
Pubic Tubercle

47
Q

EXTERNAL OBLIQUE (Action)

A

Flexion of torso

48
Q

EXTERNAL OBLIQUE (Innervation)

A

Thoracoabdominal Nerves (Anterior Rami T7-T11)

49
Q

INTERNAL OBLIQUE (Origin)

A

Fibres run superomedially
- Inguinal ligament
- Iliac Crest

50
Q

INTERNAL OBLIQUE (Insertion)

A

Linea Alba
Ribs 10-12

51
Q

INTERNAL OBLIQUE (Action)

A

Flexion of trunk

52
Q

INTERNAL OBLIQUE (Innervation)

A

Thoracoabdominal Nerves (Anterior Rami T7-T11)
Subcostal Nerve

53
Q

TRANSVERSALIS ABDOMINUS (Origin)

A

TRANSVERSALIS FASCIA deep to muscle - attaches to THORACOLUMBAR FASCIA
Thoracolumbar fascia
Iliac Crest
Inguinal ligament
Costal cartilages lower 6 ribs

54
Q

TRANSVERSALIS ABDOMINUS (Insertion)

A

Linea Alba
Pubic Crest
Pectineal line

55
Q

TRANSVERSALIS ABDOMINUS (Action)

A

Compresses abdominal contents

56
Q

TRANSVERSALIS ABDOMINUS (Innervation)

A

Thoracoabdominal Nerve (Anterior Rami T7-T11)
Subcostal Nerve

57
Q

RECTUS ABDOMINUS (Origin)

A

3-4 transverse fibrous bands = TENDINOUS INTERSECTIONS
- Pubic Crest
- Pubic Symphysis

58
Q

RECTUS ABDOMINUS (Insertion)

A

Costal Cartilages Rib 5-7
Xiphoid Process

59
Q

RECTUS ABDOMINUS (Action)

A

Compresses abdominal contents
Flexes vertebral column
Tenses abdominal wall

60
Q

RECTUS ABDOMINUS (Innervation)

A

Thoracoabdominal Nerves (Anterior Rami T7-T11)
Subcostal Nerve

61
Q

PYRAMIDALIS (Origin)

A

Pubis symphysis
Pubic symphysis

62
Q

PYRAMIDALIS (Insertion)

A

Linea Alba

63
Q

PYRAMIDALIS (Action)

A

Tenses Linea Alba

64
Q

PYRAMIDALIS (Innervation)

A

Subcostal Nerve

65
Q

RECTUS SHEATH

A

Aponeurotic layer encloses rectus abdominus
ANTERIOR WALL: Aponeurosis external oblique and internal oblique
POSTERIOR WALL: Aponeurosis internal oblique and transversus abdominus

66
Q

DERMATOMES

A

Area of skin supplied by single nerve or spinal card level
Nipple = T4
Umbilicus = T10

Musculoskeletal System (17 decks)

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