Neuroanatomy Practice Questions PDF

Neuroanatomy Practice Questions > The brachial plexus 10. musculocutaneous + median + ulnar nn 11. L4-S2 >> Lumbosacral intumescence 12. femoral + sciatic + fibular nn 13. polysynaptic 14. crossed-extensor reflex 15. False - seeing the crossed exte...

Neuroanatomy Practice Questions > The brachial plexus 10. musculocutaneous + median + ulnar nn 11. L4-S2 >> Lumbosacral intumescence 12. femoral + sciatic + fibular nn 13. polysynaptic 14. crossed-extensor reflex 15. False - seeing the crossed extensor reflex in a recumbent patient is ABNORMAL 16. cranial 17. pudendal n 18. S1-S3 19. pudendal n 20. stretch 21. tonic + phasic 22. False - clonus would be seein in a spinal cord lesion 23. Cranial >> Upper motor neuron disease 24. efferent peripheral motor neuron >> signal is coming in and perceived but no signal can be sent out to respond to stimulus 25. absent reflexes AT the site of the lesion + increased tone CAUDAL to the lesion UMN/LMN 1. UMN/LMNs are descending, efferent, motor pathways 2. brainstem 3. ventral horn of spinal cord 4. UMNs synapse on the cell bodies of LMNs 5. The motor unit a.k.a skeletal muscles 6. Dorsolateral motor system or Ventromedial motor system 7. True 8. Distal musculature - meant for precise fractionated movements 9. flexors 10. proximal - meant for posture and whole limb movements 11. extensors 12. LMN signs at the lesion + UMN signs caudal to the lesion 13. UMN signs in both limbs 14. The thoracic limb will be NORMAL + UMN signs in the pelvic limb 15. flaccid paralysis >> reflexes and tone will be decreased or absent 16. spastic paralysis >> reflexes and tone will be normal to increased ( + clonus) 17. fast 18. slow 19. pudendal nerve > voluntary control + reflex closure of the external urethral sphincter 20. pelvic nerve 21. hypogastric nerve 22. parasympathetic 23. S1-S3 24. The bladder is too full due to continual urethralis constriction 25. There is NO tone in the urethralis m so there is nothing stopping urine from leaking out