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37 Cards in this Set
- Front
- Back
Which nerves form the lumbosacral plexus?
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Ventral brs. of L3 - L7 and S1 - S3 spinal nn.
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ID these nerves (medial view).
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A - Femoral n.
B - Saphenous n. C - Obturator n. D - Sciatic n. E - Tibial n. |
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Where does the femoral nerve arise from? What nerve does it give rise to?
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L4 - 6 spinal nn.
Saphenous n. |
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What structures does the saphenous n. course with proximally (in the femoral triangle)? How about more distally?
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Proximally - femoral a. and v.
Distally - Saphenous a. and Medial saphenous v. |
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What does the femoral n. innervate?
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Iliopsoas, quadriceps femoris mm.
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What does the saphenous n. innervate?
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sartorius m. (usually)
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Which nerves provide cutaneous innervation to the following areas? (medial view in case you couldn't tell)
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A - Genitofemoral n.
B - Caudal cutaneous femoral n. C - Saphenous n. D - Caudal cutaneous sural n. E - Cutaneous brs. of superficial peroneal n. |
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Where is the saphenous nerve tested?
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Medial aspect of the stifle
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How would dysfunction of the femoral nerve present?
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Inability to extend stifle or support weight, reduced ability to rotate thigh inward, and loss of sensation over the medial stifle region.
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From which spinal nerves does the obturator nerve arise?
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L4 - L6
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Which muscles does the obturator nerve innervate?
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External obturator and adductors of the pelvis (adductor, pectineus, and gracilis) mm.
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T or F:
Dysfunction of the obturator nerve would result in loss of sensation to the inguinal region and inability to adduct the hip and thigh. |
False, *******!
Obturator has no cutaneous innervation! Try and get it right next time... |
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OK here is an easy one - through which foramen does the obturator n. pass?
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Obturator foramen
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From which spinal nerves does the caudal cutaneous femoral nerve arise?
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Ventral brs. of S1 and S2 (+/- S3)
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Which spinal nerves give rise to the lumbosacral trunk? Which nerves does this trunk give rise to?
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Ventral brs. of L6, L7, and S1 (+/- S2).
Gives rise to Cranial gluteal, caudal gluteal, and sciatic nn. |
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Which muscles does the cranial gluteal nerve innervate?
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Middle gluteal, piriformis, deep gluteal, and tensor fascia latae mm.
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Which region depicts the cutaneous area of the cranial gluteal nerve? How 'bout the caudal cutaneous femoral n.?
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*******! The cranial gluteal nerve has NO cutaneous area! Hopefully you got that D is the region for the caudal cutaneous femoral n.!!
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ID these nerves of the rump (lateral view).
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A - Sciatic n.
B - Caudal gluteal n. C - Lumbosacral trunk D - Cranial gluteal n. |
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Which muscles does the caudal gluteal nerve innervate?
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Superficial gluteal m.
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Which muscles does the sciatic nerve innervate within the pelvis?
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Internal obturator
Gemelli Quadratus femoris mm. |
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Which muscles does the sciatic nerve innervate caudal to the hip?
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Biceps femoris
Semimembranosus Semitendinosus mm. |
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Which nerves course over the greater ischiatic notch?
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Nerves of the lumbosacral trunk
(Sciatic, caudal and cranial gluteal nn.) |
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ID these nerves
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A - Sciatic n.
B - Tibial n. C - Peroneal n. |
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What spinal nerves give rise to the sciatic n.? The common peroneal n.? The tibial n.?
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Sciatic - L6, L7 & S1 (+/- S2)
Peroneal - L6/7 Tibial - L7 & S1 |
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What are the sensory branches of the sciatic nerve? What do they branch off of?
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Lateral and caudal cutaneous sural nn. from common peroneal and tibial nn. (respectively).
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What does the common peroneal nerve provide motor innervation to?
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flexors of the hock and extensors of the digits
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What does the tibial nerve provide motor innervation to?
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extensors of the hock and flexors of the digits
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What are the branches of the common peroneal and what do they innervate?
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Superficial peroneal n. innervates lateral digital extensor and peroneaus brevis mm.
Deep peroneal n. innervates cranial tibial, long digital extensor, and peroneus longus mm. |
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Which arteries do the superficial and deep peroneal nerves course with distally?
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Superficial courses w/ saphenous a. and deep courses with cranial tibial a.
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The cutaneous areas for which nerves are depicted here?
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A - Deep Peroneal n.
Superficial peroneal n. for all the rest |
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What are symptoms of peroneal nerve damage?
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Inability to flex the hock or extend the digits leads to knuckling.
Loss of sensation to dorsal aspect of the crus and pes and between digits II and III |
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ID the nerves innervating these cutaneous areas.
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A - Lateral cutaneous femoral n.
B - Lateral cutaneous sural n. C - Caudal cutaneous sural n. D - Cutaneous brs. of sephanous n. E - Superficial peroneal n. |
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Which muscles does the tibial nerve innervate?
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Gastrocnemius m.
Superficial digital flexor m. Popliteus m. Deep Digital flexor m. Caudal tibial m. |
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ID these nerves (lateral aspect)
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A - Sciatic n.
B - Tibial n. C - Common peroneal n. D - Deep peroneal n. E - Superficial peroneal n. |
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What is the sensory region of the tibial nerve?
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Plantar surface of the pes.
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How would tibial nerve damage peresent?
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Dropped hock (inability to extend hock)
Inability to flex digits Loss of sensation on caudolateral crus and plantar pes. |
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Which nerves generate the following autonomous zones?
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A - Genitofemoral n.
B - Saphenous C - Peroneal D - Tibial E - Sciatic F - Caudal cutaneous femoral G - Lateral cutaneous femoral |