Cranial Nerves Flashcards
(27 cards)
CN 1
- Name
- Origin
- Foramen
- Function
- Olfactory
- Olfactory epithelium
- Cribriform plate
- Olfaction
CN 2
- Name
- Origin
- Foramen
- Function
- Optic
- Retinal epithelium
- Optic canal
- Vision (& sensory part of the accomodation reflex)
Draw & label the passage of CN 2 & the Accomodation reflex
CN 3
- Name
- Origin
- Foramen
- Function
- Oculomotor
- Midbrain
- SOF
- Functions
- Motor - S, I, M Rectus & I Oblique [eye movement]
- Motor - Levator palpebreae superioris [eyelid movement]
- Parasympathetic [‘motor part’ from Edinger-Westphal nucleus to ciliary ganglion]
- Accomodation reflex [pupil constriction]
Draw & label the Corneal reflex
CN 4
- Name
- Origin
- Foramen
- Function
- Trochlear
- Midbrain - dorsal aspect :O
- SOF
- Superior oblique (in&down)
CN 5
- Name
- Origin
- Foramen
- Function
- Trigeminal
- Pons
- Foramen
- 1 [Opthalmic] - SOF
- 2 [Maxillary] - Rotundum
- 3 [Mandibular] - Ovale
- Function
- 1,2,3 Sensory - face, scalp, cornea
- 3 [Mandibular] Motor - Mastication (& tensor tympani - ear)
CN 6
- Name
- Origin
- Foramen
- Function
- Abducens
- Pons
- SOF
- Motor - Lateral rectus (eye out)
CN 7
- Name
- Origin
- Foramen
- Function
- Facial
- Pons
- IAM
- Function
- Motor - facial expression (& stapedius muscle)
- Sensory - ant 2/3 tongue
- Parasympathetic - lacrimal & salivary glands
Branches (To Zanzibar By Motor Car)
- Temporal - frontalis, obicularis oculi, corrugator supercilii
- Zygomatic - orbicularic oculi
- Buccal - orbicularis oris, buccinator, zygomaticus
- Marginal mandibular - mentalis
- Cervical - platysma
Draw & label the passage of CN 7 from its nuclei
Draw & label CN 7’s passage from the cortex to the face - representing UMN & LMN lesions
CN 8
- Name
- Origin
- Foramen
- Function
- Vestibulocochlear
- Pons
- IAM
- Sensory
- Vestibular nerve to Vestibular apparatus
- Cochlear nerve to Cochlear
CN 9
- Name
- Origin
- Foramen
- Function
- Glossopharyngeal
- Medulla
- Jugular foramen
- Function
- Sensory
- Post 1/3 tongue,
- Pharynx
- Carotid body & sinus
- Middle ear, eustachian tube
- Motor
- Stylopharangeus muscle [swallowing]
- Parasympathetic
- Parotid salivary gland
- Sensory
CN 10
- Name
- Origin
- Foramen
- Function
- Vagus
- Medulla
- Jugular foramen
- Functions
- Sensory
- Pharynx, larynx, oesophagus
- Aortic body & arch
- Viscera
- Motor
- Pharynx, larynx, upper oesophagus, soft palate
- Parasympathetic
- Viscera
- Sensory
CN 11
- Name
- Origin
- Foramen
- Function
- Accessory
- Medulla
- Jugular Foramen
- Motor - Sternomastoid & trapezius muscle
CN 12
- Name
- Origin
- Foramen
- Function
- Hypoglossal
- Medulla
- Hyglossal canal
- Motor - intrinsic & extrinsic of the tongue
Outline the foramina the CN pass through
Cleaners Only Spray Smelly Stuff Right On Smelly Idiots In JJJ’s house
- Cribriform plate
- Optic canal
- SOF
- SOF
- [Trigeminal]
- SOF
- Rotundum
- Ovale
- SOF
- IAM
- IAM
- Jugular foramen
- Jugular foramen
- Jugular foramen
- Hypoglossal canel
Outline the origin of the CNs
O. R. 2M’s 4P’s 4M’s
- Olfactory epithelium
- Retinal epithelium
- Midbrain
- Midbrain
- Pons
- Pons
- Pons
- Pons
- Medulla
- Medulla
- Medulla
- Medulla
Question: Or 244
Where do first-order neurones of CN 1 synape?
Olfactory bulb
What bone is the optic canal in?
Medial cranial fossa - Sphenoid bone
Where do 2nd order neurones of CN 2 synapse?
1st order - Lateral geniculate nucleus
2nd order - Optic radiation to visual cortex (and fibers going to the Pretectal nucleus for the accomodation reflex)
What is the union of CN 2 nerves called?
In which bony feature can it be found?
Optic chiasm
Chiasmatic groove in Sphenoid bone
Where do the parasympathetic motor fibres of CN 3 originate & where do they synapse?
Originate in Edinger-Westphal nucleus
Synapse in Ciliary ganglion
Neurones then innervate the Sphincter pupillae
What is unique about CN 4’s origin?
Exits posteriorly from brainstem!
