hind limb and pelvic n innervations Flashcards
what type of fibers are found in the Hypogasteric n?
what cavity do they supply innervation to?
hypogastric nn supply sympathetic innervation to the pelvic cavity
what type of fibers are found in the Pelvic n and what do they supply innervation to?
PSNS branches leave the sacral spinal nn and supply urogenital organs, recum and decending colon
simpily stated what nerve supplies sympathetic fibers to the pelvic plexus and what parasympathetic nerves leave it?
sympathetic fibers from the hypogastric n / parasympathetic fibers leave via the pelvic n.
what does the genitofemoral n supply and with what type of fibers?
the genitofemoral n arisies from L3/L4 and supplies sensory innervation to the genitalia it is also bound by fasca to the external pudendal a. in the inguinal canal.
what type of fibers are found in the pudendal n and what are its 3 branches and what do they inervate?
what happens with loss of fxn to any or all of these nn?
Pudendal n supplies somatic and sensory innervation
- caudal rectal n - somatic innervation to skelatal m of the perineum. sensory to the rectum, anal canal, and adjacent skin. - loss of innervation = fecal incinence on the side effected.
- perineal n.- supply the skin of the anus, perinium, scrotum/labium. Somatic innervation to the mm of the penis or vestibule and vulva
- dorsal n of the penis./ clitorus - sensory nn to the skin of the glands penis/ ventral commissure of the vulva and clitorus.
Where does the Obturator n arise from, what does it innervate?
the obturator n arises from the lumbosacral plexus and innervates the aductor group of mm of the hind limb.
external obturator m
pectineus m
gracilis m
adductor m
the Femoral n arises from the lumbosacral plexus and innervates what?
what happens with loss of fxn to this nerve?
the femoral n innervates the sertorious m, quadracepts mm, and iliopsoas
with loss of fxn the animal will not be able to bare weight on the limb - loss of fxn of the stifle extenser mm.
NOTE: this n runs through the belly of the iliopsoas m.
where does the saphenous n arise from and what does it innervate.
what happens with loss of fxn of this nerve?
the saphenous n arises from the femporal n and innervates the sartorius m.
- cutanious zones: medial thigh, stifle, leg, tarsus and remainder of the paw.
loss of innervation will cause ?
where does the caudal cutaneous femoral n arise from and what are it cutanious zones?
the caudal cutaneous femoral n arises from the sacral plexsus
- cutaneous zone includes the proximal caudal thigh
what makes up the lumbosacral trunck?
L6/7 and S1/2 spinla nerves
the caudal gluteal n arises from the lumbosacral trunk and innervates what?
superficial gluteal m.
the cranial gluteal n arises from the lumbosacral trunck and innervates what?
the cranial gluteal n innervates middle and deep gluteal mm and the tensor fascia latae
Sciatic (ishiatic) n arises from the lumbosacral trunk and innervates what?
what are the cranial and caudal branches that it turminates into just proximal to the lateral stifle?
the sciatic n innervtes the internal obturator m., gameli m., quatratus femorus m. and the hamstrings
- Common Peroneal (fibular) n - cranial
- Tibial n. - caudal
what is the most likely nerve to be affected with a dorsocaudal coxofemoral luxation?
sciatic n. can get pinched because it passes between the greater trochantor and the tuber ishi - damage will result from this location distally
what does the common peronial (fibular) n innervate and what are the innervations of the 3 nerves it gives rise to innervate?
name them biotch!!
innervation of the cranial tibial m., peroneus longus m. and long digital extensor.
branches include:
- lateral cutaneous sural n. - cutaneous zone: lateral surface of the cruse
- Superfical peroneal (fibular) n. - cutaneous zone: dorsal pes (found with the cranial branch of lat saph v.)
- Deep peroneal (fibular) n. - cutaneous zone: dorsal pes (found with cranial tibial a.) - flex hock n extend digits
