Neurology

• blood brain

  A) internal carotid artery

  B) basilar artery

  
• Epidural bleed artery is middle meningeal arteries
• Epidural bleed doesn't cross suture line
• Subdural bleed venous, generally bridging veins, crosses suture lines between dura and arachnoid
• fastigial nucleus input from vermis
• interposed nuclei input from anterior cerebellum, paravermis
• Dentate

  nucleus input from lateral cerebellum
• Spinocerebellar pathways

  Dorsal spinocerebellar tract

  Ventral spinocerebellar tract

  Cuneocerebellar tract

  Rostral spinocerebellar tract
• Spinocerebellar pathways All carry unconscious proprioception (afferents) from muscle spindles and Golgi Tendon Organs (GTOs) to the cerebellum
• Spinocerebellar pathways all are functionally ipsilateral tracts, even though Ventral spinocerebellar tract crosses twice
• Spinocerebellar pathways all 4 terminate in vermal and paravermal regions of the anterior lobe of the cerebellum
• Dorsal Spinocerebellar – lower limb, fine adjustments, nucleus of Clarke (send 2° neurons), inferior cerebellar peduncle (restiform body)
• Ventral Spinocerebellar – lower limb, whole limb adjustments, double-crosser, superior cerebellar peduncle (brachium conjunctivum)
• Cuneocerebellar Spinocerebellar – upper limb, fine adjustments, fasciculus cuneatus to accessory cuneate nucleus (sends 2°), inferior cerebellar peduncle
• Rostral Spinocerebellar – upper limb, whole limb adjustments, 2nd order neurons located rostral to Clarke, inferior and superior cerebellar peduncles
• Ventral Spinocerebellar double-crossing 


  1st neurons synapse in ipsi dorsal horn.

  2nd neurons immediately crosses via the anterior white commissure (along with spinothalamics), stay contralateral all the way to the superior cerebellar peduncle, then cross back in the to the ipsilateral cerebellum.