4.3 Nerves Only (K. Tong) Flashcards
What is supplied by the superior gluteal nerve?
Gluteus medius and gluteus minimus.
The superior hypogastric plexus gives rise to what three other plexuses?
Ureteric plexus.
Testicular plexus.
Common iliac plexus.
Which anterior rami give rise to the nerve of the quadratus femoris?
L4-S1
What are the branches of the sacral plexus?
Sciatic nerve.
Pudendal nerve.
Superior gluteal nerve.
Inferior gluteal nerve.
Which anterior rami give rise to the nerves to the levator ani and coccygeus?
S3, S4
What nerve contributions form the Coccygeal plexus?
S4 – S5 and coccygeal nerves.
From which spinal nerves do the somatic nerves of the lower limb, pelvis, and perineum arise?
L4-L5 (lumbar plexus contribution).
S1-Co
What is the function of the pudendal nerve?
Innervation of the perineum, and sensory afferents for the external genitalia and anal canal (below the pectinate line).
What is the function of the coccygeal plexus?
Somatic innervation to the coccygeus muscle, part of the levator ani, and the sacral coccygeal joint.
The anococcygeal nerves branch off and supply a small area of skin between the tip of the coccyx and anus.
The lumbosacral plexus receives contributions from which anterior rami?
L4-L5 and S1-S4
Which anterior rami give rise to the nerve to the obturator internus and superior gemellus?
L5-S2
What provides the sympathetic and parasympathetic contributions to the inferior hypogastric plexus?
Sympathetic: Right and left hypogastric nerves (from the superior hypogastric plexus), and the sacral splanchnic nerves.
Parasympathetic: pelvic splanchnic nerves.
The pudendal nerve comes off of which plexus?
The sacral plexus.
The pudendal nerve enters the perineum via which structure?
The lesser sciatic foramen – contained in the pudendal canal.
Which anterior rami give rise to the perforating cutaneous nerve?
S2, S3
