What is the only difference from the brain & dura matter?
dura matter does not attach to bone, it is surrounded externally by layer of cushioning fat called epidural space
White matter & gray matter
white matter - transport to signal
gray matter - integration site
Spinal tracts
known as sensory & motor pathways consisting of multineuron pathways connecting CNS to PNS
Ascending (sensory) pathway
has four main ascending tracts conducting afferent signals with two sending it to cerebral cortex (dorsal column & spinothalamic pathway) and two to cerebellum (posterior & anterior spinocerebellar pathways)
dorsal column pathway
carries signal of fine touch, pressure, & proprioception
spinothalamic pathway
carries signals of pain, temperature, deep pressure, & course touch
Posterior & anterior spinocerebellar pathways
carry subsconcious proprioception
Descending (motor pathways)
divided into pyramidal (corticospinal) tracts or all others with all these type of tracts cross over at some point