26. Pelvic Vessels and Nerves Flashcards
Nerve roots of sacral plexus?
L4 - S4
Nerve roots of sciatic nerve?
L4 - S3
What does the sciatic nerve supply?
Posterior compartment of thigh
Branches supply ALL muscles of leg and foot
Nerve roots of superior gluteal nerve?
L4, L5, S1
What does the superior gluteal nerve supply?
Gluteus medius and minimus
Nerve roots of inferior gluteal nerve?
L5, S1, S2
What does the inferior gluteal nerve supply?
Gluteus maximus
Nerve roots of nerve to obturator internus?
Direct from plexus L5, S1
What does the nerve to obturator internus supply?
OI (obvs)
And superior gemellus
Nerve roots of nerve to piriformis?
Direct from S1, S2
What nerves supply levator ani?
Direct branches from S4
Pudendal nerve
What nerves supply coccygeus?
Direct S4, S5
Nerve roots of pudendal nerve?
S2, S3, S4
Describe the course of the pudendal nerve?
Out via greater sciatic notch
Along ischial spine
In via lesser sciatic notch
Along ischioanal fossa and perineum
What does the pudendal nerve supply? (5)
Motor and sensory
Levator ani External anal sphincter External urethral sphincter Bulbospongiosus Ischiocavernosus