Revision for written test: Sacral plexus

Question 1

N. Gluteus cranialis
1.Supplies what?

Answer 1

1. Gluteus medius, gluteus profundus & tensor fasciae latae

Question 2

N. Gluteus caudalis
1. Supplies what?

Answer 2

1. Extensors of hip;
   Gluteus superficialis, Semitendinosus, Semimembranosus & biceps femoris

Question 3

N. Cutaneus femoris caudalis
1. Supplies what?

Answer 3

1. Skin on lateral & caudal aspect of thigh & hip joint

Question 4

N. Ischiadicus
1. What direction does it run? How would you “describe” the location
2. Supplies what?
3. What do the sensory fibres do?
4. Branches?

Answer 4

1. Exits through foramen ischiadicum majus
2. Supplies m. gluteus profundus, obturatorius internus, quadriceps & gemelli
3. Supply the capsule of hip joint
4. N. Tibialis et N. Peroneus communis

Question 5

N. Tibialis:
1. What direction does it run? How would you “describe” the location
2. Supplies what?
3. Branches?

Answer 5

1. Runs caudally
2. Biceps femoris, gastrocnemius, semitendinosus & semimembranosus
3. N. Cutaneus surae
   caudalis
   N. Plantaris lateralis et
   medialis

Question 6

N. Peroneus communis
1. Supplies what
2. Branches

Answer 6

1. Skin on dorsal aspect of knee
2. N. cutaneus surae lateralis
   N. peroneus superficialis et profundus

Question 7

N. Pudendus
1. Supplies what?
2. What purpose do parasympathetic fibres do?

Answer 7

1. Urethral, ischiocavernosus, bulbospongious m, perineum, rectum, penis, clitoris, vulva & caudal part of udder (eq, bo)
2. Help form nn. pelvini + pelvic plexus

Question 8

Nn. Rectales caudales
1. What direction does it run? How would you “describe” the location
2. Supplies what?

Answer 8

1. Sometimes overlaps with pudendal nerve
2. Supplies anal muscles, like external anal sphincter, bulbospongious m & perineal skin around anus