7/8- Cranial Nerves Flashcards
Damage to C1-5
UMN damage to all 4 limbs
Damage to C6-T2
Legs- UMN damage
Arms- LMN damage
Damage to T3-L3
Legs- UMN damage
Arms- Fine
Damage to L4-S2
Legs- LMN damage
Arms- fine
Attachment for I
Olfactory Bulb
Attachment fo II
Optic Chiasm
Attachment for III
Rostral Midbrain (ventral)
Attachment for IV
Midbrain/pons junction (dorsal
Attachment for V
Pons (lateral)
Attachment for VI
Pontomedullary junction
Ventral
Attachment for VII
Pontomedullary junction
Ventral/Lateral
Attachment for VIII
Pontomedullary junction
Ventral/Lateral)
Attachment fo IX
Rostral Medullar (Lateral)
Attachment for X
Rostral Medullar (Lateral)
Attachment for XI
Cervical spinal cord (L)
Attachment fo XII
Rostral medulla (Ventral/lateral)
Damage to Olfactory Nerve
Anosmia- can’t smell
Conductive- problem with axon
Sensorineural- damage to pathway
Inner Hair Cells
Principle source of sound info
Outer Hair Cells
Controls sensitivity
Pupillary Light Reflex/ Oculomotor Dx
Abnormal pupillary light response
Lack of constriction of pupil
Function of VI
ABduction of eye
Innervates lateral rectus (ipsilateral)
Function fo XI
Shrugging shoulder
Turning head to contralateral side
Supranuclear Damage to Hypoglossal Nerve
Weakness of contralateral muscles
Tongue moves away from side of damage
Nucelar or Nerve Damage to Hypoglossal Nerve
Weakness of ipsilateral muscles
Tongues moves towards side of damage
Sensory Territory of V
Skin of face
Mucous membrane
Teeth
Dura mater
Intracranial muscles
Mesencephalic nuclei
Only CNS nucleus to contain unipolar sensory neurons
V Has Motor Innervartion to
Mastication muscle
Tensor timpani (inner ear)
Tensor palati (soft palate)
Mylohyoid and digastric muscle (under jaw)
Supranuclear Lesions to Facial Nerve
Contralateral motor weakness of lower face
Nuclear Lesion to Facial Nerve
Complete facial and abducens paralysis on side of lesion
Can’t raise eyebrow, close eye, retract lip
Lesion in nucleus and nevre affects abducens nerve which innervates lateral rectus= can’t ABduct eye
Bell’s Palsy
Complete paralysis on sid of lesion
Can’t raise eyebrow, close eye, retract lip
Solitary Nucleus Receives Input From
Viscera
Taste buds (posterior 1/3)
Carotid body (chemoreceptor- monitors CO2,pH levels)
Carotid sinus (Monitor BP -Barr receptor)
Mucous Membranes
Glossopharyngeal Nerve
IX
Primarily sensory
Vagus Nerve
X
Most widely distributed CN
Mainly parasymptathetic innveration
- One side innervates thorax, one side innervates abdomen
Have afferent and efferents from these regions
Stimulus and response can be in different parts of the body
VII Role in Taset
Soft Palate
Foliate papillae
Fungiform papillae
IX Role in Taste
Circumvallate papillae
Foliate papillae
X Role in Taste
Epiglottis
Projection of Tastes
VII and IX go to VPM of thalamus, then go to gustatory ` in insula
Where does optic nerve go in thalamus
LGN
Where does vestibular nerve go in thalamus
MGN
Where does olfactory nerve go in thalamus
Dorsomedial nucleus—> VPM—-> inferior salivatory nucleus
Where does trigeminal nerve go in thalamus
VPM
Where does Glossopharyngeal nerve go in thalamus
VPM
Where does Vagus nerve go in thalamus
VPM and VPL
In General, sensation from body goes to
VPL (via DCML and spinothalamic)
In general, sensation from face goes to
VPM
3 Zones of trigeminal nerve
Opthalamic (forehead)
Maxillary (mouth)
Mandibular (jaw)
