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med sch hahahha > lower limb dermatomes and myotomes > Flashcards

lower limb dermatomes and myotomes Flashcards

1
Q

L1 dermatome

A
  1. Inguinal region
  2. Skin over upper anterior aspect of thigh
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2
Q

L1 myotome

A

Hip flexion
* iliopsoas

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3
Q

L2 dermatome

A

Anterolateral aspect of upper thigh

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4
Q

L2 myotome

A

Hip flexion
* iliopsoas

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5
Q

L3 dermatome

A

Anteromedial area of thigh

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6
Q

L3 myotome

A

Hip adduction
* adductor group

Knee extension
* quadriceps femoris

Hip flexion

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7
Q

L4 dermatome

A

Anteromedial aspect of leg and medial malleolus

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8
Q

L4 myotome

A

Knee extension
* quadriceps femoris

Hip adduction
* adductor group

Ankle dorsiflexion

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9
Q

L5 dermatome

A
  1. Lateral aspect of the thigh and knee
  2. Anterolateral aspect of the leg
  3. Dorsum of the foot,
  4. The big toe + 1st 4 toes
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10
Q

L5 myotome

A

Ankle dorsiflexion
*Tibialis anteriormuscle: difficulty heel walking (foot drop)

First toe dorsiflexion:
* Extensor hallucis longus muscles

Knee flexion
* hamstring muscles

Hip extension
* hamstring
* gluteus maximus

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11
Q

S1 dermatome

A
  1. Dorsolateral aspect of thigh and leg
  2. lateralaspect of the foot + heel (posterior)
  3. pinky toe
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12
Q

S1 myotome

A

Foot plantarflexion:
* Gastrocnemius muscle

Foot eversion
* Peroneus longus and brevis muscles

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13
Q

S2-4 dermatome

A

Posterioraspect of the thigh and leg (S2),perineum(S3–S4), perianal (S4)

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14
Q

S2-4 myotome

A

Abduction of digits (S2-3)

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15
Q

Ilioinguinal nerve roots

A

L1

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16
Q

Ilioinguinal nerve dermatome

A
  1. skin over anteromedial part of upper thigh
  2. adjacent skin of perineum
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17
Q

Genitofemoral nerve roots

A

L1-L2

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18
Q

Genitofemoral dermatome

A

(femoral branch)
* skin on anterior central part of upper thigh

(genital branch)
* anterior part of perineum

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19
Q

Femoral nerve roots

A

L2-L4

20
Q

Femoral nerve dermatome

A
  1. skin over anterior thigh,
  2. anteromedial knee
  3. medial side of leg and foot
21
Q

Femoral nerve myotome

A

all muscles in anterior compartment of thigh
1. quadriceps femoris
2. sartorius
3. iliacus
4. psoas major
5. pectineus

22
Q

Obturator nerve dermatome

A
  • skin over medial aspect of thigh
  • articular branches: hip and knee joint
23
Q

Obturator nerve myotome

A

all muscles in medial compartment of thigh (except pectineus and part of adductor magnus attached to ischium)
1. adductor longus
2. adductor magnus
3. adductor brevis
4. gracilis
5. external obturator

24
Q

Obturator nerve roots

A

L2-L4

25
Q

Sciatic nerve roots

A

S4-L3

26
Q

Sciatic nerve dermatome

A
  1. Skin over lateral side of leg and foot
  2. Over the sole
  3. dorsal surface of the foot
27
Q

Branches of the sciatic nerve

A
  1. tibial nerve
  2. Common fibular nerve (superficial and deep branches)
28
Q

Tibial nerve myotome

A

muscles in posterior compartment of leg
1. gastrocnemius
2. plantaris
3. soleus
4. popliteus
5. tibialis posterior
6. flexor digitorum longus
7. flexor hallucis longus

intrinsic muscles of the foot
1. most plantar muscles

29
Q

3 branches of tibial nerve

A
  1. medial calcaneal nerve
  2. medial plantar nerve
  3. lateral plantar nerve
30
Q

Dermatome of medial calcaneal nerve (branch of tibial nerve)

A

skin over heel

31
Q

Dermatome of medial plantar nerve (branch of tibial nerve)

A

medial half of the sole (excluding the heel) and plantar aspect of medial 3.5 toes

32
Q

Dermatome of lateral plantar nerve (branch of tibial nerve)

A

lateral half of sole and plantar aspect of lateral 1.5 toes

33
Q

Tibial nerve roots

A

L4-S3

34
Q

Common fibular nerve roots

A

L4-S2

35
Q

Common fibular nerve myotome

A

muscles in the anterior and lateral compartment

36
Q

Superficial fibular nerve roots

A

L5-S1

37
Q

Superficial fibular nerve myotome

A

muscles in the lateral compartment
1. fibularis longus
2. fibularis brevis

Eversion of subtalar joint and plantarflexion of ankle

38
Q

Deep fibular nerve roots

A

L4-S1

39
Q

Deep fibular nerve myotome

A

muscles in the anterior compartment
1. tibialis anterior
2. extensor digitorum longus
3. extensor hallucis longus
4. fibularis tertius

intrinsic muscles of foot
1. extensor hallucis brevis
2. extensor digitorum brevis

40
Q

superior gluteal nerve roots

A

L4-S1

41
Q

superior gluteal nerve myotome

A

muscles of the gluteal region
1. gluteus medius
2. gluteus minimus
3. tensor fasciae latae

42
Q

inferior gluteal nerve roots

A

L5-S2

43
Q

inferior gluteal nerve myotome

A

muscles of the gluteal region
1. gluteus maximus

43
Q

lateral cutaneous nerve of thigh nerve roots

A

L2-L3

44
Q

lateral cutaneous nerve of thigh dermatome

A
  1. parietal peritoneum in iliac fossa
  2. skin over anterolateral thigh
45
Q

posterior cutaneous nerve of thigh nerve roots

A

S1-S3

46
Q

posterior cutaneous nerve of thigh dermatome

A
  1. skin over gluteal fold
  2. upper medial aspect of thigh and adjacent perineum
  3. posterior aspect of thigh
  4. upper posterior leg

med sch hahahha (2 decks)

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