Thoracic A&P Flashcards

1
Q

T/F: the thickness ratio of thoracic IVDs created kyphosis

A

F!!

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2
Q

what causes kyphosis in the T spine?

A

vertebral body posterior wedging

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3
Q

which levels having a typical articulation with ribs?

A

T2-T9
ribs articulate w/ costal facets above & below and w/ disc

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4
Q

which levels having atypical articulation with ribs?

A

T1, T10-T12
ribs articulate with respective vertebra

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5
Q

how are TPs oriented in T spine?

A

at same level of corresponding body

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6
Q

how are z joints oriented in upper t spine?

A

45-60 deg from horizontal

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7
Q

how are z joints oriented in mid t spine?

A

90 deg from horizontal

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8
Q

how are z joints oriented in lower t spine?

A

inclined towards sagittal plane

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9
Q

explain the rule of 3s for t spine

A

T1-3: at same levels
T4-6: 1/2 level down
T7-9: 1 level down
T10: 1 level down
T11: 1/2 level down
T12: same level

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10
Q

what is the disc to vertebral body ratio in t spine?

A

1:5
discs smaller and thinner than C & L

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11
Q

where is the spinal canal the most narrow?

A

T4-T9

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12
Q

which spinal ligament is thicker?

A

ALL

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13
Q

what are the true ribs?

A

1-7
attach directly to sternum

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14
Q

what are the false ribs?

A

8-10
attach to costocartilage

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15
Q

what are the floating ribs?

A

11-12
unattached anteriorly

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16
Q

which vertebral body will most commonly have a cervical rib?

A

C7
(~80% report TOS)

17
Q

which ribs articulate with a single vertebral body?

A

ribs 1, 10, 11, 12

18
Q

how do ribs 2-9 articulate with the t spine?

A

w/ 2 adjacent vertebral bodies and intervening disc

19
Q

what makes up the costotransverse joint?

A

TP and rib tubercle

20
Q

which costo-sternal joints are synchondrosis joints?

A

T1, T6, T7
(little movement)

21
Q

which costo-sternal joints are synovial joints?

22
Q

which segments are the most at risk for disrupted blood supply to the SC bc it is poorly vascularized?

23
Q

T/F: all spinal nerve in the thoracic regions have a sympathetic component

24
Q

which spinal levels provide sympathetic innervation to the head?

25
Q

which spinal levels provide sympathetic innervation to the UEs?

26
Q

which spinal levels provide sympathetic innervation to the trunk/thorax?

27
Q

which spinal levels provide sympathetic innervation to the LEs?

28
Q

how are SB and rotation coupled in T spine?

A

ipisilateral

29
Q

where does pure axial rotation occur?

A

CT junction
TL junction

30
Q

how should upper ribs (T1-6) move?

A

pump handle

31
Q

how should lower ribs (T7-10) move?

A

bucket handle

32
Q

describe the movement of the diaphragm during inhalation

A

contracts and descends

33
Q

describe the movement of the diaphragm during exhalation

A

relaxes and ascends