Nerves of Pelvic Limb Flashcards
L4 is called?
Lateral cutaneous femoral
Lateral cutaneous femoral n. runs with?
Deep circumflex iliac a. and v.
Lateral cutaneous femoral n. innervates?
- Skin over lateral thigh
2. Stifle joint
Genitofemoral n. comes from?
L3 and L4
Genitofemoral n. cross the surface of?
External iliac a.
Genitofemoral n. course
Passes through inguinal canal with external pudendal a. and v.
Genitofemoral n. innervates?
Skin over medial thigh
Male: prepuce and scrotum
Female: inguinal mammary glands, skin surround vulva
Test side for genitofemoral n.
Femoral triangle
Action of quadriceps femoris m. on stifle joint?
Extends
Stifle joint aka?
Genual joint
Femoral n. formed by?
L4-L6
Femoral n. passes through?
Iliopsoas m.
Saphenous n. branches off of?
Femoral n.
Femoral n. innervates?
- Quadriceps femoris
2. Iliopsoas
Femoral n. causes what action?
Extends stifle joint
Injury to femoral n. causes?
Paralysis of quadriceps femoris → incapable of supporting weight
Nerve in femoral trangle
Saphaneous n. (passes through vascular lacuna)
Nerve in inguinal canal
Genitofemoral n.
Saphenous n. location in medial thigh
Cranial to femoral v. and a.
Saphenous n. location distal to stifle
Cranial to medial saphenous v. and saphenous a.
Saphenous a. innervates what m.?
Sartorius m.
Autonomous zone of saphenous n.
Medial aspect of thigh
Medial aspect of tarsus innervated by?
- Saphenous n.
2. Sciatic n. branches
Adductor mm. of pelvic limb
- Adductors
- Gracilis
- Pectineus
Obturator n. causes what action?
Adducts pelvic limb
Obturator n. formed by?
L4-6
Obturator n. formed in?
Iliopsoas m.
How does obturator n. leave pelvic cavity?
Through obturator foramen
Which n. can be damaged during calving?
Obturator n.
Largest part of lumbosacral plexus
Lumbosacral trunk
Lumbosacral trunk formed by?
L6, L7, S1, S2
Nerves of lumbosacral trunk
- Cranial gluteal n.
- Caudal gluteal n.
- Sciatic n.
Cranial gluteal n. formed by?
L6-S1
Cranial gluteal n. leaves pelvic cavity how?
Over greater ischiatic notch
Cranial gluteal n. accompanies?
Cranial gluteal a. and v.
Cranial gluteal n. found?
Under middle gluteal m.
Cranial gluteal n. innervates?
- Middle gluteal m.
- Deep gluteal m.
- Tensor fascia lata
Caudal gluteal n. formed by?
L6-S2
Caudal gluteal n. leaves pelvic cavity how?
Over greater ischiatic notch
Caudal gluteal n. is found by?
Caudal gluteal a. and sacrotuberous ligament
Caudal gluteal n. mainly inneravtes?
Superficial gluteal m.
Largest n. in the body
Sciatic n.
Sciatic n. accompanies?
Caudal gluteal n.
Sciatic n. at hip joint is covered by?
Biceps femoris m.
Sciatic n. terminates as?
- Common fibular n.
2. Tibial n.
Sciatic n. innervates what mm.?
- Biceps femoris
- Quadratus femoris
- Semitendinosus
- Semimembranosus
Sciatic n. inneravtes what skin?
- Lateral distal half of thigh
2. Lateral and caudal crus
Flexor mm. of tarsus?
- Cranial tibial
- Fibularis longus
- Fibularis brevis
Digital extensor mm.?
- Long digital extensor
2. Lateral digital extensor
Flexor mm. of tarsus and digital extensor mm. are innervated by?
Common fibular n.
Common fibular n. action?
Flex tarsus, extend digits
Common fibular n. formed by?
L6-7
Smaller terminal branch of sciatic n.
Common fibular n.
Lateral cutaneous sural n. given off by?
Common fibular n.
Common fibular n. passes between
Lateral digital extensor and fibularis longus mm.
Common fibular n. divides into?
Superficial and deep fibular nn.
Injured common fibular n. will present as?
Dropped foot (knuckled over)
Superficial fibular n. runs?
Distally along long digitial extensor m.
Deep fibular n. runs?
Distally with cranial tibial a.
Common fibular n. innervates what skin?
- Dorsolateral distal crus
2. Dorsal metatarsal and digits
Extensor m. of tarsus
- Gastrocnemius
2. SDF
Digital flexor mm.
- SDF
2. DDF
Extensor mm. of tarsus and digital flexor mm. are innervated by?
Tibial n.
Tibial n. has what action?
Extend tarsus, flex digits
Tibial n. formed by?
L6, L7
Larger terminal branch of sciatic n.
Tibial n.
Tibial n. at stifle passes between?
Median and lateral heads of gastrocnemius m.
Where does tibial n. divide?
Just proximal to tarsocrural joint
Tibial n. divides into?
- Medial plantar n.
2. Lateral plantar n.
Tibial n. innervates what mm.?
- Extensor mm. of tarsus
- Digital flexor mm.
- Interossei mm.
Tibial n. innervates what skin?
Plantar surface of metatarsus and digits
Injury of tibial n. presents as?
Dropped hock
Caudal cutaneous femoral n. formed by?
S1 and S2
Caudal cutaneous n. passes?
Caudally toward ischiatic tuberosity on medial side of sacrotuberous lig.
Caudal cutaneous femoral n. innervates?
Skin over caudal thigh