PNS Flashcards
Cell body in nuc of cns
Direct to skeletal musc
Lower motor neurons
Cell bodies in cerebral cortex
Direct and indirect
Muscle tone
Upper motor neurons
Interneurons
Connect upper and lower
Local circut neurons
Start and stop movement
Basal nuclei neurons
Coordinate and check body movements
Cerebellar neurons
Vía réflex arcs
Ongoing body actions
Involuntary
Autonomic nervous system
Myelinated
ACh
Cell body in CNS
Preganglionic
Un myelinated
Outside CNS
Norepinephrine or ACh
Postganglionic neuron
Most organs are…
Both divisions
Dual innervation
Sympathetic division
Thoracolumbar
T1-L3
3 named sympathetic trunk ganglia
Above diaphragm
Sides
Superior ganglia
Middle ganglia
Inferior ganglia
Prevertebral ganglia (4)
Organs below diaphragm
Anterior
Celiac
Superior mesenteric
Aorti corenal
Renal
Out system
Preganglionic fibers exit SC
Myelinated
White rami communicantes
Inbound system
Unmyelinated
Postganglion
Grey rami communicantes
3 fates of Preganglionic axon
synapse in ganglion
Synapse in diff ganglion
Pass w/o synapse and go to prevertebral ganglion (splanchnic)
To celiac ganglion
Stomach
Spleen
Liver
Pancreas
Greater splanchnic nerve
To aorti corenal ganglion
Small and large intestine
Lesser splanchnic nerve
To renal ganglion
Kidney
Ureters
Least splanchnic nerve
To inferior mesenteric ganglion
Large intestine
Genitals
Bladder
Lumbar splanchnic nerve
Autonomic plexuses
Cardiac plexus
Pulmonary plexus
Celiac plexus (largest)
Superior mesenteric plexus
Hypogastric plexus
Renal plexus
Parasympathetic division
Craniosacral division
CN 3 7 9 10
CN 3
Eye
Ciliary ganglia
CN 7
Face
Lacrimal
Pterygopalatine ganglia
CN 7
Face
Salivary
Submandibular ganglia
CN 9
Parotid
Salivary
Largest
Otic ganglia
75% all
Heart lungs digest
Vagus
Sacral parasympathetic
Pelvic splanchnic nerves
Symp vs parasympathetic
Ganglia near vert col/near organ
Short Preganglionic fibers/long
Post gang use NE/ACh
Somatic vs visceral senses
Touch temp/ internal so BP blood pH
6 special senses
Equilibrium
Smell
Taste
Hear
Vision
Blood vessels
Chemicals
Muscles
Interoceptors
Pressure
Surface
Touch pain temp
Exteroceptors
Muscles
Tendons ligaments joints
Stretch or relaxes
Proprioceptors
Equilibrium
Pressure
Mechanical stimulus
Mechanoreceptors
Temperature stim.
Thermoreceptors
Light
Retna
Photoreceptors
Chemicals
pH blood
Mouth nose
Chemoreceptors
Tissue damage
Pain
Nociceptors
Osmotic pressure of body fluids
Solutes
Thirst
Osmoreceptors
Most in body
Bare dendrites
Free nerve endings
2 free nerve endings
Merkel disk
Hair follicle receptors
CT cover dendrites
Encapsulated nerve endings
Encapsulated nerve ending
Concentric appearance
Deep dermis
Heavy pressure
Pacinian or lamellated corpuscle
Encapsulated nerve ending
Scale appearance
Dermal papillae
Start and end
Light pressure
Meissner corpuscle
Encapsulated nerve endings
Reticular region
Hand/feet
Contin. Deep press.
Ruffini corpuscles
Stretch reflex
Tendon reflex
Joint
Muscle spindles
Golgi tendon organs
Joint kinesthetic receptors
