Sacral Plexus Flashcards Preview

Gross II - Lumbar and Sacral plexus > Sacral Plexus > Flashcards

Flashcards in Sacral Plexus Deck (16)
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1

Coccygeus Muscle

aka Ischiococcygeus Muscle
Anterior primary rami S3, S4

2

Levator Ani Muscle

Anterior primary rami S3, S4
Perineal branch of pudendal N

3

Sacral Plexus

Lumbosacral plexus L4, L5
Anterior primary rami S1-S4

4

Branches of the sacral plexus which supply the buttock and lower limb

Superior gluteal N
Inferior gluteal n
Sciatic N
Nerve to Obturator Internus Muscle
Nerve to quadratus femoris muscle
Posterior cutaneous nerve to thigh

5

Superior gluteal N

L4, L5, S1 - Gluteus medius, gluteus minimus, and tensor fasciae latae muscle (Not gluteus maximus*)

6

Inferior gluteal N

L5, S1, S2 - Gluteus maximus*

7

Sciatic N

L4 - S3 - Numerous structures in the lower extremity

8

Nerve to obturator internus muscle

L5, S1, S2 - Obturator internus and superior gamellus muscles

exits thru the greater sciatic foramen inferior to piriformis and then enters thru the perineum thu the lesser sciatic foramen

9

Nerve to quadratus femoris muscle

L5, S1 - quadratus femoris and inferior gemellus muscles

10

Posterior cutaneous nerve of thigh

S1, S2, S3 - sensory to part of gluteal region and perineum (anal triangle)

11

Branches to the Sacral Plexus which supply the pelvis

Nerve to piriformis muscle
Nerves to levator ani and coccygeus muscles
nerve to external anal sphincter muscle
Pudendal Nerve

12

Coccygeal plexus

anterior primary rami S4, S5 and the coccygeal Nerve

Supplies the sacrococcygeal joint, the coccyx, and overlying skin

13

Nerve to piriformis muscle

S1, S2

14

nerves to levator ani and coccygeus muscle

S3, S4

15

Nerve to external anal sphincter muscle

S4

16

Pudendal nerve

S2, S3, S4 - Gives off important branches to the perineum