Nervous system Flashcards
Cranial Nerve I
Olfactory
Cranial nerve II
Optic
Cranial nerve III
Oculomotor
Ciliary muscle/external eye muscles
Cranial nerve IV
Trochlear
Superior oblique muscle (eye)
Cranial Nerve V
Trigeminal
Sensory face
Cranial nerve VI
Abducent
Lateral rectus muscle
(Lateral eye)
Cranial nerve VII
Facial
Muscle
Cranial Nerve VIII
Vestibulocochlear
Cranial Nerve IX
Glossopharyngeal
Taste- posterior tongue
Other motor/sensory functions
Cranial nerve X
Vagus
Motor & Sensory- heart/lungs
Cranial nerve XI
Accessory
Trapezius
Cranial nerve XII
Hypoglossal
Tongue muscles
End response of sympathetic nervous system is termed:
Adrenergic
End response of parasympathetic nervous system is termed:
Cholinergic
Parasympathetic NS
Rest/digest
Craniosacral outflow- Nerves 3,7,9,10 & sacral
Discrete/targeted response due to proximity of nerves to end organs
Sympathetic Nervous System
Fight or Flight
Thoracolumbar Outflow T1-12 & L1-3
Blow horn/amplification response due to shorter preganglionic fiber
Ganglion
A group of nerve cell bodies in the peripheral nervous system- synaptic relay station
Are preganglionic neurons in the PNS/SNS adrenergic or cholinergic?
They differ in length but are cholinergic (ie they use nicotinic receptors at ganglion
Become more specific at end organ
Neurotransmitter and receptor of parasympathetic nervous system
Acetylcholine and cholinergic receptors
Neurotransmitter and receptor of parasympathetic nervous system
Acetylcholine and cholinergic receptors
Neurotransmitter and receptor of the sympathetic nervous system
Norepinephrine and adrenergic receptors
Types of cholinergic receptors
Nicotinic- skeletal muscle & neuronal CNS
Muscarinic- end organ receptors- M1/2/3 are important because they affect airway smooth muscle
Why is adrenal medulla interesting
Part of SNS
Direct synapse with Preganglionic neuron- (NO postganglionic neuron) releases epi/norepi directly into blood stream
Why are sweat glands unique in the SNS?
They secrete Ach instead of norepi from postganglionic neuron- have muscarinic receptors
Sympathomimetic-
drugs with similar actions to postganglionic fibers in SNS. Also termed sympathetic or adrenergic agonists
Sympatholytics
Oppose the actions of postganglionic fibers in SNS. Also called Anti-adrenergics or sympathetic antagonists
Parasympathomimetics
Agonists at postsynaptic muscarinic receptors- referred to cholinergic- resemble Ach
Parasympatholytics
Oppose actions of the PNS, block actions of acetylcholine. Also called anti cholinergic or vagolytics
