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Musculoskeletal System > Muscles of Trunk > Flashcards

Muscles of Trunk Flashcards

(66 cards)

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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
DIAPHRAGM - DOMES
Dome appearance left and right side Left dome= 5th intercostal space Right dome= Rib 5
26
DIAPHRAGM - BLOOD SUPPLY
SUPERIOR surface: ~ Pericardiophrenic ~ Musculophrenic ~ Superior phrenic INFERIOR surface: ~ Inferior phrenic
27
DIAPHRAGM - INNERVATION
Phrenic Nerve C3,C4, C5 (C3,4,5 keeps the Diaphragm alive)
28
PSOAS MAJOR (Origin)
Body, Intervertebral Discs and Transverse Processes T12, L1- L5
29
PSOAS MAJOR (Insertion)
Lesser trochanter Femur
30
PSOAS MAJOR (Action)
Flex thigh at hip joint when trunk stabilized Flex trunk when body supine
31
PSOAS MAJOR (Innervation)
Anterior Rami L1-L3
32
PSOAS MINOR (Origin)
Body T12 and L1
33
PSOAS MINOR (Insertion)
Pectineal line and Illiopubic eminence
34
PSOAS MINOR (Action)
Weak flexor Lumbar vertebral column
35
PSOAS MINOR (Innervation)
Anterior Rami L1
36
QUADRATUS LUMBORUMS (Origin)
Psoas Major Medially and Transversus Abdominus Laterally - Transverse Process L5 - Iliac Crest - lliolumbar Process
37
QUADRATUS LUMBORUMS (Insertion)
Transverse Processes L1- L4 Inferior border Rib 12
38
QUADRATUS LUMBORUMS (Action)
Depresses and Stabilizes Rib 12 Lateral bending of trunk Both muscles together extend trunk
39
QUADRATUS LUMBORUMS (Innervation)
Anterior Rami T12, L1-L4
40
ILIACUS (Origin)
Psoas Major Medially and Transversus Abdominus Laterally - Iliac fossa
41
ILIACUS (Insertion)
Joins Psoas Major insert on Iesser trochanter Femur
42
ILIACUS (Action)
Flexes thigh at hip joint Flexes trunk when supine
43
ILIACUS (Innervation)
Femoral Nerve
44
SUPERFICIAL FASCIA
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
EXTERNAL OBLIQUE (Origin)
Midline aponeurosis = LINEA ALBA Fibers run inferomedially - Lower six rib shafts (T7-T12)
46
EXTERNAL OBLIQUE (Insertion)
Linea Alba Pubic Tubercle
47
EXTERNAL OBLIQUE (Action)
Flexion of torso
48
EXTERNAL OBLIQUE (Innervation)
Thoracoabdominal Nerves (Anterior Rami T7-T11)
49
INTERNAL OBLIQUE (Origin)
Fibres run superomedially - Inguinal ligament - Iliac Crest
50
INTERNAL OBLIQUE (Insertion)
Linea Alba Ribs 10-12
51
INTERNAL OBLIQUE (Action)
Flexion of trunk
52
INTERNAL OBLIQUE (Innervation)
Thoracoabdominal Nerves (Anterior Rami T7-T11) Subcostal Nerve
53
TRANSVERSALIS ABDOMINUS (Origin)
TRANSVERSALIS FASCIA deep to muscle - attaches to THORACOLUMBAR FASCIA Thoracolumbar fascia Iliac Crest Inguinal ligament Costal cartilages lower 6 ribs
54
TRANSVERSALIS ABDOMINUS (Insertion)
Linea Alba Pubic Crest Pectineal line
55
TRANSVERSALIS ABDOMINUS (Action)
Compresses abdominal contents
56
TRANSVERSALIS ABDOMINUS (Innervation)
Thoracoabdominal Nerve (Anterior Rami T7-T11) Subcostal Nerve
57
RECTUS ABDOMINUS (Origin)
3-4 transverse fibrous bands = TENDINOUS INTERSECTIONS - Pubic Crest - Pubic Symphysis
58
RECTUS ABDOMINUS (Insertion)
Costal Cartilages Rib 5-7 Xiphoid Process
59
RECTUS ABDOMINUS (Action)
Compresses abdominal contents Flexes vertebral column Tenses abdominal wall
60
RECTUS ABDOMINUS (Innervation)
Thoracoabdominal Nerves (Anterior Rami T7-T11) Subcostal Nerve
61
PYRAMIDALIS (Origin)
Pubis symphysis Pubic symphysis
62
PYRAMIDALIS (Insertion)
Linea Alba
63
PYRAMIDALIS (Action)
Tenses Linea Alba
64
PYRAMIDALIS (Innervation)
Subcostal Nerve
65
RECTUS SHEATH
Aponeurotic layer encloses rectus abdominus ANTERIOR WALL: Aponeurosis external oblique and internal oblique POSTERIOR WALL: Aponeurosis internal oblique and transversus abdominus
66
DERMATOMES
Area of skin supplied by single nerve or spinal card level Nipple = T4 Umbilicus = T10

Musculoskeletal System (17 decks)

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