Fossa rhomboidea

Question 1

borders of fossa rhomboidea

Answer 1

upper border - pedunculi cerebellares superiores
inferior border - pedunculi cerebellares inferiores
lateral borders - pedunculi cerebellares medii

Question 2

Locus caeuleus

Answer 2

in the upper part of fossa rhomboidea, close to sulcus limitans

pigmented noradrenergic nerve cells

influence activity of all parts of brain, “panic center”

Question 3

Nervus trigeminus

Answer 3

CN5
sensory & motor fibers

nucleus motorius nervi trigemini: motor, afferent impulses via tractus corticonuclearis

nucleus principalis nervi trigemini: sensory, touch impulses from head

nucleus mesencephalicus nervi trigemini: sensory, impulses from proprioceptors of masticatory muscles

nucleus spinalis nervi trigemini: sensory, pain & temperature impulses from the head

Question 4

Nervus abducens

Answer 4

CN 6
only motor fibers

nucleus nervi abducentis: afferent impulses from tractus corticonuclearis

Question 5

Nervus facialis

Answer 5

CN7
motor & sensory & parasympathetic fibers

nucleus nervi facialis: motor, afferent impulses via tractus corticonuclearis

nucleus salivatorius superior: parasympathetic

nucleus tractus solitarii: sensory, common with CN 9 and 10 caudal zone responsible for visceral functions, rostral zone related to gustation

Question 6

Nucleus tractus solitarii

Answer 6

Common nucleus of CN 7, 9 and 10
Two zones: caudal and rostral
Caudal zone controls visceral functions
Rostral zone controls gustation

Question 7

Nervus vestibulocochlearis

Answer 7

CN8
sensory fibers

nervus vestibularis:
nucleus vestibularis inferior, superior, medialis, lateralis

nervus cochlearis:
nucleus cochlearis anterior & posterior

Question 8

Nervus glossopharyngeus

Answer 8

CN9
motor, sensory & parasympathetic fibers

nucleus ambiguus: motor, common with CN 10 & 11

nucleus salivatorius inferior: parasympathetic

nucleus tractus solitarii: sensory, common with CN 7 & 10

Question 9

Nervus vagus

Answer 9

CN10
motor, sensory & parasympathetic fibers

nucleus ambiguus: motor, common with CN 9 & 11

nucleus tractus solitarii: sensory, common with 7 & 9

nucleus dorsalis (posterior) nervi vagi: parasympathetic

Question 10

Nervus accessorius

Answer 10

CN11
only motor fibers

nucleus ambiguus: common with CN 9 & 10, radix cranialis, appears on medulla oblongata

nucleus nervi accessorii: radix spinalis, appears on the spinal cord –> enters cranial cavity via foramen magnum –> joins radix cranialis and forms nervus accessorius

Question 11

Nervus hypoglossus

Answer 11

CN12
only motor fibers

nucleus nervi hypoglossi: lies in trigonum nervi hypoglossi