Somatic motor systemSpinal cord ventral root spinal nerve ventral ramus or dorsal ramus skeletal muscleAutonomic Nervous SystemVisceral motor systemRegulates body temperatureCoordinates many system functionsCardiovascularRespiratoryDigestiveExcretoryReproductiveInnervatesSmooth muscleCardiac muscleGlands2 sub systemssympathetic system- thoracolumbar system2 neuron systemspreganglionic neuronal- cell body and fiber/axonpostganglionic neuronal-parasympathetic system- craniosacral system2 neuron systemspreganglionic neuronal- cell body and fiber/axonpostganglionic neuronal-Pathways for visceral motor outputTwo neuron systemPreganglionic neuronsVisceral motor neurons (cell body) in the CNSAxon is preganglionix fibersAxons synapses on postganglionic neuronsPostganglionic neuronsVisceral motor cell bodies located within ganglia in PNSAxon is postganglionic fiberInnervatesSmoothCardiacglandsOff of ventral primary ramusGrey communicating ramusWhite communicating ramusSomatic motor skeletal musclesOne neuron systemVisceral motor smooth, cardiac, glandsTwo neurons system- ANSSympathetic SystemThoracolumber division (T1-L2)Where preganglionic neurons are located (T1-L2)Postganglionic neurons in sympathetic chain/trunk or collateral gangliaThe beaded structure on the outside of spinal cord found all the way down sacral nervedFunctionStimulates tissue metabolismIncrease alertnessPrepares body to deal with emergenciesFight or flightSympathetic trunkgrey communicating ramus skin, sweat galds, erector pilli muscle, blood vesselsOrgans- visceral nerves from trunk to organsGrey communicating rams postganglionic?White communicating ramus preganglionic?Parasympathetic system= craniosacral systemBrainstem and cranial nerves 3, 7, 9, 10Sacral nerve (Mainly from vagus nerve to organ of thoracic cavity and abdominal cavity and sacral part innervate organs of abdominopelvic cavityDual innervationMany organsAdrenal GlandGray communicating ramus- connected to sympathetic postganglionic fibers to the skin to innervate sweat glands, erector pili, and blood vessels31 to 32 pairs of gray communication ramicollateral gangliapostganglionic sympathetic neuronsinnervate abdominopelvisParasympathetic- cranial- oculomotornucleus in brain stem oculomotorcilia muscle allows to see things focused at a distance and up closedual innervationsympathetic- dilator muscleparasympathetic- constrictor muscleNeurotransmitter releaseAll pre Ach (acetylocholine)Post para release AchPost sym release NE (norepinephrine/epinephrine)Nervous System 16/03/2010 18:21:00← Somatic motor system- Spinal cord ventral root spinal nerve ventral ramus or dorsal ramus skeletal muscle← Autonomic Nervous System- Visceral motor system- Regulates body temperature- Coordinates many system functionsoCardiovascularoRespiratoryoDigestiveoExcretoryoReproductive- InnervatesoSmooth muscleoCardiac muscleoGlands- 2 sub systemsosympathetic system- thoracolumbar system2 neuron systemspreganglionic neuronal- cell body and fiber/axonpostganglionic neuronal-oparasympathetic system- craniosacral system2 neuron systemspreganglionic neuronal- cell body and fiber/axonpostganglionic neuronal-← Pathways for visceral motor output- Two neuron systemoPreganglionic neuronsVisceral motor neurons (cell body) in the CNSAxon is preganglionix fibersAxons synapses on postganglionic neuronsoPostganglionic neuronsVisceral motor cell bodies located within ganglia in PNSAxon is postganglionic fiber- InnervatesoSmoothoCardiacoglands← Off of ventral primary ramus- Grey communicating ramus- White communicating ramus← Somatic motor skeletal muscles- One neuron system← Visceral motor smooth, cardiac, glands- Two neurons system- ANS← Sympathetic System- Thoracolumber division (T1-L2)- Where preganglionic neurons are located (T1-L2)- Postganglionic neurons in sympathetic chain/trunk or collateral gangliaoThe beaded structure on the outside of spinal cord found all the way down sacral nerved- FunctionoStimulates tissue metabolismoIncrease alertnessoPrepares body to deal with emergencies- Fight or flight- Sympathetic trunkgrey communicating ramus skin, sweat galds,erector pilli muscle, blood vessels- Organs- visceral nerves from trunk to organs- Grey communicating rams postganglionic?- White communicating ramus preganglionic?← Parasympathetic system= craniosacral system- Brainstem and cranial nerves 3, 7, 9, 10- Sacral nerve (- Mainly from vagus nerve to organ of thoracic cavity and abdominal cavity and sacral part innervate organs of abdominopelvic cavity- Dual innervationoMany organs← Adrenal Gland-← Gray communicating ramus- connected to sympathetic postganglionic fibers to the skin to innervate sweat glands, erector pili, and blood vessels← 31 to 32 pairs of gray communication rami← collateral ganglia- postganglionic sympathetic neurons- innervate abdominopelvisParasympathetic- cranial- oculomotor- nucleus in brain stem oculomotor- cilia muscle allows to see things focused at a distance and up close← dual innervation- sympathetic- dilator muscle- parasympathetic- constrictor muscle← Neurotransmitter release- All pre Ach (acetylocholine)- Post para release Ach- Post sym release NE (norepinephrine/epinephrine)-←16/03/2010 18:21:00←16/03/2010