neuro4 easy Flashcards
The only cranial nerve that doesn’t exit anteriorly
CN IV
The only cranial nerve that doesn’t synapse in the thalamus
CN I
Pure motor nerves
CN III, IV, VI, XI, XII
Mixed nerves
CN V, VII, IX, X
Where is the oculomotor nuclei?
Superior colliculus
Nerve supply to SR, MR, IR, IO
Oculomotor
Parasympathetic nerve supply to sphincter pupillae
Oculomotor
Parasympathetic nerve supply to the ciliary muscle
Oculomotor
What type of nerve fibres in the oculomotor nuclei?
Somatic motor
Parasympathetic
Where is the trochlear nucleus?
Inferior colliculus
Where is the abducens nucleus?
4th ventrical/ caudal pons
Nerve supply to the geniog, hyog, stylog?
Hypoglossal
Nerve supply to the intrinsic tongue muscles?
Hypoglossal
Which nerve:
Somatosensation of face: discriminative touch, vibration sense, pain, temperature
CN V
Which nerve:
Proprioception associated with chewing (TMJ), muscles of mastication, teeth
CN V
Which nerve:
Motor control of muscles of mastication
CN V
Which nerve:
Motor control of tensor tympani, mylohyoid, ant. belly of digastric, tensor veli palatini
CN V
Which nucleus:
Proprioception info from chewing muscles (CNV) ?
Mesencephalic nucleus
Which nucleus:
Discriminative touch, vibration (CNV)?
Pontine
Which nucleus:
Pain and temp (CNV)
Spinal nucleus
this is the only site in the CNS where the cell bodies of the primary afferent neurons live inside the CNS
Mesencephalic nucleus
Is info from the pontine trigeminal nucleus conveyed unilaterally or bilaterally?
Bilaterally
- pontine nucleus = discriminative touch, vibration
- fibres leave here, some cross midline and some don’t = bilateral representation of touch and vibration in cortex
(CN V remember)
Motor to muscles of facial expression, stapedius
CN VII
Parasymp. to pterygopalatine and submandibular ganglia
CN VII
Tast to anterior 2/3rds tongue
CN VII
Tactile sense, pain and temperature sense from the posterior tongue, pharyngotympanic tube and upper pharynx
(pharyngotympanic tube = eustachian tube)
CN IX
Taste to posterior 1/3rd tongue
CN IX
Parasymp. fibres to the otic ganglion (parotid gland)
CN IX
Motor to the stylopharyngeus?
CN IX
CN IX only supplies motor to ONE muscle!!
Tactile sense, pain and temperature sense from the pharynx, larynx, trachea, oesophagus and thoracic and abdominal viscera
CN X
Taste to epiglottis
CN X
Paraymp. fibres to ganglia serving thoracic and abdominal viscera
CN X
Motor to striated muscle of the pharynx and larynx
-which other nerve contributes to this function
CN X ( spinal accessory also contributes to this function)
Nucleus ambiguus
-This is where you’ll find CN IX motor nerves (stylopharyngeus)
Nucleus ambiguus shared by CN IX, X and part of XI
(CNIX: stylopharyngeus
CN X: pharyngeal and laryngeal muscles)
Commissural nucleus
Sensation etc (pain, temp) from post. tongue to upper pharnyx
CN IX
Solitary nucleus
Taste and visceral info
CN VII, IX and X
Which nerves share the sup. and inf. salivary nuclei
CN VII and IX
parasymp. to ganglia of salivary glands and pterygopalatine ganglion
This nucleus supplies motor efferents to muscles of the pharnyx, larynx and upper oesophagus
Nucleus ambiguus
shared by CN IX, X and part of XI
This nucleus extends in a V shape from upper to lower medulla
Nucleus solitarus
Which nerves share the nucleus solitarus?
CN VII, IX and X
Which part of the pyramidal tract supplies motor fibres to the cranial nerves?
The corticobulbar tract
Input to the cranial nerves containing parasympathetic efferents comes mainly from where?
The hypothalamus
What does the reticular formation do?
Integrate cranial nerve reflexes.
Participate in conduction and modulation of pain.
Influence voluntary movement.
Regulate autonomic activity.
Integrate some basic functions, like respiration and sleep.
Activate the cerebral cortex: major component of the Ascending Reticular Activating System (a medial bilateral lesion of the brainstem reticular formation at or above the upper pons causes irreversible coma)
