Pons

Question 1

Gray substance of pars basilaris pontis

Answer 1

nuclei pontis: 2nd order neurons of voluntary movement coordination pathway

white substance between nuclei pontis = FIBRAE PONTIS TRANSVERSAE, fibers of tracts that synapse in pontine nuclei (tractus corticopontinus & tractus pontocerebellaris)

Question 2

Gray substance of tegmentum pontis

Answer 2

nuclei craniales (CN5,6,7,8) in fossa rhomboidea

nuclei corporis trapezoidei: part of auditory pathway

nucleus olivaris superior

formatio reticularis

Question 3

White substance of pars basilaris pontis

Answer 3

1. tractus corticospinalis
2. tractus corticonuclearis
3. tractus corticopontinus
4. tractus pontocerebellaris

Question 4

tractus corticonuclearis

Answer 4

pyramidal system

synapses with motor nuclei of cranial nerves 5,6,8

Question 5

tractus corticopontinus

Answer 5

pathway of voluntary coordination of movements

formed by axons of cerebral cortex neurons,
synapse with nuclei pontis

Question 6

tractus pontocerebellaris

Answer 6

pathway of voluntary coordination of movements

axons of pontine nuclei –> cross and go to opposite sides of cerebellum via pedunculi cerebellares medii

Question 7

white matter of tegmentum pontis - ascending tracts

Answer 7

lemniscus medialis
lemniscus spinalis
lemniscus trigeminalis
lemniscus lateralis 
tractus spinocerebellaris anterior
corpus trapezoideum

Question 8

lemniscus medialis

Answer 8

conscious proprioception and fine touch sensation

formed by axons of nucleus gracilis & cuneatus

Question 9

lemniscus spinalis

Answer 9

pain & temperature & light touch

tractus spinothalamicus anterior and lateralis

Question 10

lemniscus trigeminalis

Answer 10

fibers from sensory nuclei of CN5 –> they cross

Question 11

lemniscus lateralis

Answer 11

part of auditory pathway (with corpus trapezoideum)

Question 12

tractus spinocerebellaris anterior

Answer 12

goes to cerebellum via pedunculus cerebellaris superior

Question 13

white matter of tegmentum pontis - descending tracts

Answer 13

tractus rubrospinalis
tractus tectospinalis
fasciculus longitudinalis medialis
tractus reticulospinalis

Question 14

ventriculi quarti borders

Answer 14

between tegmen ventriculi quarti and fossa rhomboidea

upper border: velum medullare superius (white matter between penduculi cerebellares superiores)

lower border: velum medullare inferius (white matter between pedunculi cerebellares inferiores)