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CNO > PARASYMPATHETIC and OCULOSYMPATHETIC > Flashcards

PARASYMPATHETIC and OCULOSYMPATHETIC Flashcards

1
Q

iris muscle - radial

A

dilate

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2
Q

Iris muscle - circumferrential

A

iris sphincter

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3
Q

fibers that terminates at the PTN in the midbrain

A

Pupillary fibers

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4
Q

fibers that terminate at the LGN of the thalamus

A

Visual fibers

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5
Q

pathway coming from receptors to CNS

A

Afferent parasympathetic pupillary pathway

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6
Q

pathway from CNS to effectors

A

efferent

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7
Q

Afferent parasympathetic pathway

A

Retina
Optic Nerve
Optic Chiasm
Optic Tract
PTN

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8
Q

Efferent parasympathetic pathway

A

EWN
CNIII
Pre-ganglionic fibers
Ciliary ganglion
Post-ganglionic fibers
Short ciliary nerve
Iris sphincter muscle

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9
Q

pupil characteristics observed

A

size
color
shape
speed of response

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10
Q

Visual pathway is also known as

A

retino-thalamocortical pathway

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11
Q

stimulates the pupillary sphincter muscle causing pupillary constriction

A

short ciliary nerves

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12
Q

2 decussations during pupillary light reflec

A
  • Optic chiasm
  • between the PTN and EWN
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13
Q

*light directed to left eye
Damage to left CNII

A

No direct and consensual

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14
Q

*light directed to left eye
Damage to optic chiasm

A

present both direct and consensual

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15
Q

*light directed to left eye
Damage to left CNIII

A

absent direct, present consensual

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16
Q

*light directed to left eye
Damage to left CNIII

A

present direct, absent consensual

17
Q

Oculosympathetic pathway

A

hypothalamus
midbrain
spinal cord (C8, T1, T2)
ventral root of spinal cord
apex of lungs
cervical ganglion
carotid artery
ophthalmic branch of CNV
long ciliary nerve
dilator pupillae muscle

18
Q

First-order neuron

A

posterolateral hypothalamus
passes through the midbrain
brainstem and intermediolateral column of spinal cord
exits at C8, T1, T2

19
Q

second-order

A

ventral spinal root
arch over apex of lung
synapsing in the superior cervical ganglion

20
Q

third-order

A

travels with carotid artery
cavernous sinus with ophthalmic branch of CNV
passes through ciliary ganglion
reaches eye as long ciliary nerve
Dilator pupillae muscle

21
Q

comprised of axons of ganglions

A

optic nerve

CNO (2 decks)

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