Download MBBS Anatomy PPT 86 Cutaneous And Dermatomal Innervation Of Ll Notes

Learning Objectives

? Dermatomes of lower limb
? Cutaneous nerves of lower limb:

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? Areas of distribution and

? Spinal segments of origin

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? Clinical Correlates

Dermatomes of lower limb
Overview of Body Dermatomes

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Cutaneous Nerves of Lower Limb

1. Dorsal Rami of L1,L2,L3

2. Dorsal Rami of S1,S2,S3

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3. Lateral Cutaneous Branch of Subcostal Nerve(T12)

4. Lateral Cutaneous Branch of Iliohypogastric Nerve(L1)

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5. Lateral, Medial and Intermediate Cutaneous Nerve of Thigh(DD-L2,L3,L4)

6. Posterior Cutaneous Nerve of Thigh(VD-S2,S3 and DD-S1,S2)

7. Perforating Cutaneous Nerve (DD-S2,S3)

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8. Saphenous Nerve(DD-L2-4)

9. Lateral Cutaneous Nerve of Calf(DD-L2,L3)

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10. Sural Nerve(VD-S1,S2)

11. Superficial and Deep Peroneal Nerve

12. Calcaneal Branch of Tibial Nerve(VD-S1,S2)

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Innervation

Plexuses of the Lower Limb/Lumbosacral plexus

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Lumbar Plexus

Sacral Plexus

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Cutaneous Innervation of Lower Limb

MCQs

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Question :- An examiner has asked the student about the dermatomal

innervation of anterior surface of knee joint. What do you think will be

the most appropriate answer of this question?

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a. L2
b. L3
c. L4
d. L5
Question :- Meralgia paraesthetica is condition which produces an

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area of impaired sensation, often with pain and paraesthesia on

the anterolateral aspect of the thigh. Injury to which of the

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fol owing nerve is responsible for this condition?
a. Medial cutaneous nerve of thigh
b.Lateral cutaneous nerve of thigh
c. Posterior cutaneous nerve of thigh
d.Intermediate cutaneous nerve of thigh

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