| Name |
Function |
Pathway |
Tract Direction |
| Corticospinal |
Precise & skilled voluntary movement |
precentral gyrus- pyramidal decussation- internucial neurons- alpha motor neurons |
Descending |
| Reticulospinal |
influence unskilled voluntary movements |
reticular formatioin- crossed & uncrossed to alpha moter neurons |
Descending |
| Reticulospinal |
reflex activity |
functions by facilitationg or inhibiting motor neurons |
Descending |
| Tectospinal |
Feflex postural movement to visual stimuli |
superior colliculus- cross & decend to cervical internuncial pools |
Descending |
| Rubrospinal |
Facilitates flexors & inhibits extensors |
Red Nucleus- cross and descend to internuncial pools |
Descending |
| vestibulospinal |
Facilitates extensors & inhibits flexors for BALANCE |
lateral vestifular nucleus- descend to internuncial pools |
Descending |
| Lateral Spinothalmic |
pain & temp |
periphery- DRG- cross segmentally & ascend to thalamus- to postcentral gyrus |
Ascending |
| Anterior Spinothalamic |
crude light touch |
periphery- DRG- cross segmentally & go to thalamus- postcentral gyrus |
Ascending |
| Dorsal Columns |
discriminative touch |
periphery- DRG- nuclei gracilis/cuneatus- cross at medulla & ascend to thalamus- postcentral gyrus |
Ascending |
| Posterior Spinocerebellar |
unconscious proprioception |
periphery- DRG- nucleus dorsalis- cross segmentally & ascend through superior cerebellar peduncle to cerebellum |
Ascending |
| Anterior Spinocerebellar |
unconscious proprioception |
periphery- DRG- cross segmentally & ascend through superior cerebellar peduncle to cerebellum |
Ascending |
| Spinotectal |
spino visual reflexes |
periphery- DRG- cross segmentally & ascend to superior colliculus |
Ascending |
| Spinoreticular |
Levels of consciousness |
periphery- DRG- ascend to nuclei of reticular formation |
Ascending |
| Spino-olivary |
Cutaneous & proprioceptive information |
periphery- DRG- cross segmentally & ascend to inferior olive- cross back through inferior peduncle to cerebellum |
Ascending |