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701 Anatomy > Lumbosacral Plexus > Flashcards

Lumbosacral Plexus Flashcards

1
Q

what is nerve plexus

A

branching network of intersecting nerves - made up of anterior (ventral rami) of spinal nerves

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2
Q

autonomic

A

involuntary actions - heart rate, digestion

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3
Q

somatic

A

voluntary actions - muscle contractions, skin

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4
Q

iliohypogastric nerve (plexus)

A

L1

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5
Q

ilioinguinal nerve (plexus)

A

L1

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6
Q

genito femoral nerve (plexus)

A

L1-L2

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7
Q

Lateral Cutaneous Nerve (plexus)

A

L2-L3

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8
Q

Obturator Nerve (plexus)

A

L2-L4

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9
Q

Femoral Nerve (plexus)

A

L2-L4

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10
Q

Lumbar Plexus

A

iliohypogastric n.
ilioinguinal n.
genito fermoral n.
lateral cutaneous n.
Obturator n.
Femoral n.

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11
Q

Sacral Plexus

A

Superior gluteal n.
Inferior gluteal n.
Posterior cutaneous n.
Sciatic n.
Tibial n.
Common fibular n.
Pudendal n.

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12
Q

superior gluteal nerve (plexus)

A

L4 - S1

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13
Q

inferior gluteal nerve (plexus)

A

L5-S2

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14
Q

Posterior cutaneous nerve (plexus)

A

S1-S3

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15
Q

Sciatic nerve (plexus)

A

L4-S3

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16
Q

Tibial nerve (plexus)

A

L4 - S3

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17
Q

Common fibular nerve (plexus)

A

L4-S2

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18
Q

Pudendal nerve (plexus)

A

S2-S4

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19
Q

What motor supply to medial thigh muscles ?

A

Obturator nerver (L2-L4)

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20
Q

What motor supply to anterior thigh muscles?

A

Femoral Nerve (L2-L4)

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21
Q

True or False: Females are at greater risk for IPBSN damage during hamstring tendon graft harvest?

A

True

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22
Q

Infrapatellar branch of the saphenous nerve

A

IPBSN

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23
Q

Lumbosacral trunk

A

L5 minaly with same contribution from L4
travels along Ala of sacrum
most fibers contribute to common fibular division of sciatic nerve

24
Q

Most fibers contribute to this during the sciatic nerve split

A

common fibular division

25
Q

fascia lata

A

deep fascia of the thigh

25
Q

thigh

A
  • specialized for posture and locomotion
26
Q

compartment

A

connect to the intermuscualr septa (mostly collagen)
Elastin Fibers/no fat

27
Q

Coxa valga

A

greater than 139degree

28
Q

coxa vara

A

less than 115degree

29
Q

oblique angle of the femur put _____ on the femoral neck

A

strain

30
Q

true or false: fracture of the femoral neck are less common in elderly individuals

A

false (they are more common)

31
Q

Anterior Compartment

A

-Hip Flexors - Knee Extensors
- innervated by Femoral Nerve
- blood: femoral artery, deep femoral artery and lateral circumflex artery

32
Q

Anterior compartment muscles

A

rectus femoris
sartorius
V. lateralis
V. medialis
V. intermedius

33
Q

sartorius

A

O: ASIS
I: Medial proximal tibia (pes anserinus)
Inn: Femoral nerve
Blood: Deep femoral artery, lateral femoral circumflex artery
Actions: hip flexion, Abd, ER, knee flexion/IR

34
Q

Iliacus

A

O: iliac fossa
I: lesser trochanter of the femur
Inn: femoral nerve
blood: iliolumbar artery
actions: hip flexion, ER, Unilateral -later flexion of trunk: Bilateral - raise trunk from supine position

35
Q

Psoas major

A

O: lateral surfaces of vertebrae T12-L4 and costal facets of the vertebrae L1-L5
I:lesser trochanter of the femur
Inn: direct branches of lumbar plexus (L1-L3)
Actions: Hip flexion, ER; unilateral - lateral flexion of trunk - raise trunk from supine position

36
Q

what makes up the femoral triangle

A

SIA

Sartorius
Inguinal ligament
Adductor long

37
Q

what is your floor for the femoral triangle

A

pectinous
illiopsoas muscles

38
Q

What are 4 options for a coronary artery bypass graft?

A

internal thoracic arter
radial artery
gastroepiploic artery
Great saphenous vein

39
Q

great saphenous starts where? where does it empty to?
ascends on ___ leg and thigh

A

dorms of the foot
femoral vein
medial

40
Q

what ligament holds down structures passing anterior to the hip joint during flexion - ASIS to pubic tubercle

A

inguinal ligament

41
Q

this nerve has a relation with the retroinguinal space

A

femoral nerve

42
Q

macular compartment consist of

A

iliopsoas muscle
federal nerve

43
Q

the vascular compartment consist (vascular lacuna)

A

femoral artery and vein
lymphatics
genitofemoral nerve (femoral branch)

44
Q

what is the femoral sheath?

A

continuation of the transversalis and iliopsoas fascia
allows gliding during movement of the thigh

45
Q

What is the femoral canal ?

A

medial compartment of the femoral sheath
allows expansion of femoral vein
site of hernias

46
Q

femoral hernia usually occurs due to?

A

weak point of the abdominal wall

47
Q

what happens if the hernia passes through saphenous opening?

A

It can enlarge

48
Q

medial compartment

A

hipp adductors
stabilize the pelvis in Coronal/sagittal planes
INN: obturator nerve
Blood: DFA, LFCA, OA

49
Q

Medial compartment consist of?

A

Pectineus
Add. Longus
Add. Brevis
Add. Magnus
Gracilis
Obturator Externus

50
Q

what goes through Adductor canal

A

femoral artery
femoral vein
saphenous nerve

51
Q

what goes through adductor hiatus

A

Femoral artery
Femoral Vein

52
Q

anterior branch

A

longus
brevis
gracilis
pectineus

53
Q

posterior branch

A

Magnus (adductor and hamstring portion)

54
Q

groin injury

A

strain/sprain /stretching of the proximal attachments of the medial thigh adductors

if tearing occurs - it is typically at the proximal attachment of the muscle

55
Q

strains of adductor longgus = riders strain

A

can have ossification of the tendons
due to active adduction of thighs to keep form falling off the horse

701 Anatomy (18 decks)

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