Week 5 Flashcards
Sympathetic nerve division
Thoracolumbar
Parasympathetic nerve division
Cranial sacral
Special Senses
Smell, vision, hearing, balance, taste
Upper motor neureons function
Primary motor cortex
Lower motor neuron
brainstem , spinal cord
Are motor cranial nerves located more medially or laterally?
Medially
CN I
Olfactory
CN I infromation
SSA
CN I foramen
Cribriform plate
CN I nucleus
Olfactory bulb
CN I lesions
Anosmia (loss of smell)
Which is the only CN nerve not to have a direct pathway to the thalmus
Olfactory Nerve
CN II
optic Nerve
CN II information
SSA
CN II foramen
Optic canal
Which optic info cross over at the optic canal?
Nasal retina
CNS nucleus of CN II
LGN (lateral geniculate nucleus)
What id optic radiation
Visual info from CN II synapsing from the lateral genticulate nucleus to the visual cortex (occipital lobe)
name the 3 projections of CN II
Hypothalmus - Regulation of cicardian rythms
Pretectum: Refelx control of pupil and lense
Superior colliculus: orientating movement of head and eyes
Name and describe the 2 pathways from the lateral genticulate nucleus to the visual cortex
Myers loop : travels via temporal lobe , fibres are for inferior retinal quadrants (inferior visual field)
Second Lopp: travels via parietal lobe. fibres from superior retinal quadrants (inferior visual field)
Name the 2 projections from visual cortec once SSA has been interpreted
Ventral pathway (temporal lobe) - object recignition
Dorsal pathway (parietal lobe) - Spatial vision
What are the names of CN III, IV & VI? and what are there main functions?
Occulomotor, Torchlear, Abducens
Eye movement
What is the mnemonic for CN 3,4 and 6?
LR 6 SO 4 R 3
Which muscle does CN IV control?
Superior Oblique
Whuch muscle does CN VI control?
Lateral Rectus
What movement is associated with the Inferior oblique eye muscle?
up and lateral
is CN III motor or visceral?
BOTH
What is the nucleus for CN III?
Occulomotor
What would a lesion to CN III cause?
Trouble looking down and laterally
What nucleus is the GVE portion of CN III associated with?
Eidenger - Westphal
Where oes the CN III GVE synapse @
Ciliary ganglion
does CN III have a sympathetic or parasympathetic divsion?
Para
What would a lesion to eidenger-westphal cause? cause?
Pupil dilation, loss of pupilarry refelex, eye droop
WHat will the contraction of sphincter pupillae cause?
Pupil constriction
describe the process of accomodation
Medial rectus contracts to allow covergence of eye, pupillary convergence
Cillary muscles contract to adjust lense thickness
What fissue does CN III, IV and VI pass through?
Superior orbital fissure
What would a lesion to CN IV cause?
inability to look down when the eye is abducted
Where in the CNS is the abducens nuceli found?
Pons near 4th ventricle
WHat would a lesion to CN VI cause?
No lateral eye movement
Which of the 3 branches of CN V is both motor and sensory?
Mandibular
Name the 3 branches of the trigeminal nerve and which fissures/ foramen they pass through
Olphamic : superior orbital fissure
Maxillary : rotundum
Mandibular : ovale
Which branch of trigem has sensory receptors for the dura in the middle and anterior craniel fossa
Maxillary
What % of tongue does CN V, 3 cover, and what type of information is it?
Ant 2/3 GSE
Name the muscles of mastication
Masseter, temporalis, Med and lat pterygoid
What cranial nerve is bells palsy associated with?
CN III
Which GSE are these muscles associated with?
Tensor Tympani
Tensor Veli Palatini
Ant. belly digastric
Mylohoid
Trigeminal v3
What is Trigemina Neuraglia?
Sharp pain, that becomes more frequent, especially near mouth, not linked to teeth
What is CN VII
Facial
Name all the info type for CN VII
GSE
GVE
GSA
SSA
Name the foramen for the facial nerve
Int. Aud. meatus
Stylomastoid process
mneumonic for facial branches
Two Zedbras Bit My Cat
What is the visceral component of the facial nerve
lacrimal and salivary gland
What is the SSA of facial
Taste Ant 2/3 of tongue
What GSA is associated with CN VII
skin around ear, nasopharynx, soft palate
what are the 2 sensory nuclei for the facial nerve?
Spinal nucleus of CN V (sensory)
Solitary nucelus (taste)
what GVE is CN VII associated with?
lacrimal gland,
submandibular and sublingual glands
Mucous membrane of nasal and oral cavity
What information does CN VIII interpret?
SSA
What part of CN VIII is associated with balance? and what mechanisms does it use?
Vestibular
Semi circular canals
Utricle - Horizontal
Saccule - Verticle
What is associated witht he hearing aspect of CN VIII
Cochlear (hair cells)
Which cranial nerve is bells palsy associated with? describe some symptoms
VII
Uni laterall weakness and loss of function of muscles of facial expression
possible loss of taste sensation on anterior 2/3 rd of tongue.
What information is associated with CN IX
GVA
SSA
GVE
GSE
What foramen does CN IX pass through?
Jugular
Why is CN IX association with the coratoid artery?
sensory through barorecetpros of common corotid bification to sense BP and acidity
Name some GVA associated with CN IX
Carotid body and sinus Post 1/3 of tongue (somatic and special) Palantine tonsils Upper Pharynx Mucosa of middle ear Pharyngotympanic tube (aud. tube)
Which nucleus is association toe GVA infor from CN IX
Spinal nucleus CNV
Solitary nucleus
GVE info of CN IX
Parotid salivory gland (otic ganglion)
Nucleus associated with GVE aspect of CN IX
Inferior salvitory nucleus
What mm is associatioed with the GSE aspect of CN IX
stylopharyngeus (helps shortening of pharynx to swallow)
Where is the nucleus of the GSE aspect of CN IX found ?
Nucleus ambiguous
What would a lesion to the CN IX cause?
loss of tase and sensation of soft palate
Name the ganglions associated with CN IX
Superior (jugular)
Inferior (petrosal)
Otic ganglion
