Spinal cord funiculi — locations?
Dorsal, lateral, ventral columns.
Funiculi — function?
Contain white matter tracts for signal transmission.
Ascending tracts — role?
Carry sensory info toward the brain.
Descending tracts — role?
Convey motor commands from brain to spinal cord.
Spinothalamic pathway — function?
Transmits pain and temperature to the thalamus.
Third-order neuron — location?
In the thalamus, relays to cortex.
Lateral thalamus — pain?
Processes discriminative pain aspects.
Medial thalamus — pain?
Processes emotional and motivational pain aspects.
Spinocervicothalamic pathway — role?
Conscious sensory pathway from spinal cord to brain.
Motor system — components?
Upper and lower motor neurons.
Upper motor neurons — location?
In brain and brainstem.
Lower motor neurons — location?
In spinal cord ventral horn or cranial nerve nuclei.
Extrapyramidal tracts — function?
Modulate lower motor neuron activity.
Corticospinal tract — origin?
Cerebral cortex.
Reflex arc components — list?
Receptor, sensory neuron, CNS synapse, motor neuron, effector.
Patellar reflex — segments?
L4–L6 via femoral nerve.
Panniculus reflex — stimulus?
Skin prick at C8–T1.
Perineal reflex — response?
Anal sphincter contraction, tail flexion.
Answer 18 questions on Spinal Cord Pathways and Reflexes.
1. What do the dorsal, lateral, and ventral funiculi of the spinal cord represent?
2. Which statement best describes the general function of descending spinal pathways?
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