Canine Limbs- Nerves Flashcards
What makes up the brachial plexus?
Nerves from last C6-8 and T1-2
Suprascapular nerve (origin, supply site, pathway, clinical signs)
Origin: C6-7
Supplies: lateral shoulder muscle
Path: around neck of scapula close to bone
Clinical signs: lateral slip of shoulder joint, sweeney in horses
Musculotaneous nerve (origin, supply site, clinical signs)
Origin: C7-8
Supplies: main elbow flexors (biceps brachii, brachialis)
Clinical signs: not debilitating due to compensation of other muscles, no sensation in medial antebrachium
Axillary nerve (origin, supply site, clinical signs)
Origin: C8
Supplies: shoulder joint flexors
Clinical signs: damage would be compensated
Where does the radial nerve originate?
C7-T1
What are the three cardinal effects of severe proximal radial nerve damage?
Paralysis of elbow extensors
Paralysis of carpal and digital extensors
Loss of skin sensation
Where do the median and ulnar nerves originate?
C8-T1/2
Where do hindlimb nerves come from?
Lumbosacral plexus
Obturator nerve (origin, supply site, path)
Origin: L4-6
Supplies: medial adductor muscles of thigh
Path: through obturator foramen
Femoral nerve (origin, path, clinical signs)
Origin: L4-6
Path: runs in femoral triangle
Clinical signs: catastrophic to quadriceps femoris
Sciatic nerve (origin, path, terminal branches)
Origin: L6-S2
Path: over ischiatic notch and caudal over hip, medial to greater trochanter, between biceps femoris and semitendinosus
Terminal branches: common peroneal and tibial nerves
Peroneal nerve
damage will result in extended hock and dorsal surface of the paw in contact with the ground, not as damaging as radial nerve paralysis
Tibial nerve
damage paralyzes tarsal extensors and digit flexors
