Across
- 2. Brain and spinal cord make up this division of the nervous system
- 4. Supports neurons and helps form the blood-brain barrier in the CNS
- 5. Myelinated fiber that transmits sharp, localized pain
- 6. Brainstem region involved in descending pain modulation
- 8. Neurotransmitter released by the raphe nuclei during pain inhibition
- 12. Type of reflex with only one synapse between sensory and motor neurons
- 15. Spinal horn where motor neurons reside
- 17. Glial cell responsible for myelination in the PNS
- 18. Type of motor neuron that innervates extrafusal muscle fibers
- 19. Type of reflex initiated by muscle spindle activation
- 20. Major ascending tract that transmits pain and temperature
- 21. Unmyelinated fiber that transmits slow, dull pain
- 23. Area of skin innervated by a single spinal nerve
- 24. Motor system that controls voluntary movement of skeletal muscles
Down
- 1. Term for motor or sensory functions involving internal organs
- 3. Type of pain felt at a site distant from its actual origin
- 6. Division of the autonomic nervous system responsible for "rest and digest"
- 7. Mechanism by which visceral and somatic afferents share spinal neurons
- 9. Myelin-producing cell in the CNS
- 10. Nerves and ganglia outside the brain and spinal cord
- 11. Nerves that carry autonomic fibers to abdominal and pelvic viscera
- 13. Spinal horn where sensory neurons synapse
- 14. Type of endogenous opioid that modulates pain
- 16. An automatic motor response to a sensory stimulus
- 19. Division of the autonomic nervous system responsible for "fight or flight"
- 22. Type of motor neuron that adjusts sensitivity of muscle spindles