PNS Spinal and Cranial Nerves Peripheral Nervous System

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PNS: Spinal and Cranial Nerves

PNS: Spinal and Cranial Nerves

Peripheral Nervous System l l l Exterior to the CNS Interacts with CNS Cranial

Peripheral Nervous System l l l Exterior to the CNS Interacts with CNS Cranial and Spinal Nerves

Cranial Nerves l l l 12 in total Named by Roman Numerals and Names

Cranial Nerves l l l 12 in total Named by Roman Numerals and Names ex: Cranial Nerve V Primarily serve head/neck region Except 1 nerve (Vagus) that goes out

Mnemonic Device to remember l On Old Olympus Towering Tops A Friendly Viking Grew

Mnemonic Device to remember l On Old Olympus Towering Tops A Friendly Viking Grew Vines and Hops Also for Sensory/Motor/Both l Some Say Marry Money But My Brother Says Big Brains Matter More

Function Chart l Make yourself a chart in your notes (I- XII) l Nerve

Function Chart l Make yourself a chart in your notes (I- XII) l Nerve name, function, sensory/motor

Function of each

Function of each

Spinal Nerves l l 31 total spinal nerves DORSAL and VENTRAL root converge external

Spinal Nerves l l 31 total spinal nerves DORSAL and VENTRAL root converge external to spinal column

Dorsal l l Carries sensory fibers (afferent) Carries info TOWARDS CNS Ventral l l

Dorsal l l Carries sensory fibers (afferent) Carries info TOWARDS CNS Ventral l l Carries motor fibers (efferent) Carries info AWAY from CNS

1 st Break Down: Sensory/Motor Peripheral Nervous System Sensory (Afferent) Motor (Efferent)

1 st Break Down: Sensory/Motor Peripheral Nervous System Sensory (Afferent) Motor (Efferent)

Sensory l l l Pick up info from environment via receptors 5 receptors Classed

Sensory l l l Pick up info from environment via receptors 5 receptors Classed by stimulus Motor l l Movement induced via NT Remember NMJXN and ACH…

Sensory Receptors l Mechanoreceptors: changes via movement – l l Ex: touch, pressure, stretch,

Sensory Receptors l Mechanoreceptors: changes via movement – l l Ex: touch, pressure, stretch, vibration Thermo: temperature Photo: Light Chemo: Chemicals in solution Nociceptors: PAIN

Secondary Division of MOTOR Peripheral Nervous System Sensory (Afferent) Motor (Efferent) Somatic (Voluntary) Autonomic

Secondary Division of MOTOR Peripheral Nervous System Sensory (Afferent) Motor (Efferent) Somatic (Voluntary) Autonomic (Involuntary)

Somatic Motor l l Voluntarily activates muscles (skeletal) Neuron- cell body in CNS and

Somatic Motor l l Voluntarily activates muscles (skeletal) Neuron- cell body in CNS and Axon to muscle

Autonomic Motor l l Regulates smooth & Cardiac muscle Regulates glands Maintains stability/homeostasis Neuron

Autonomic Motor l l Regulates smooth & Cardiac muscle Regulates glands Maintains stability/homeostasis Neuron Comm- 2 NEURONS – – – 1 st in CNS 2 nd in PNS Connection b/w 2 made in ganglion

3 rd Division (of autonomic) Peripheral Nervous System Sensory (Afferent) Motor (Efferent) Somatic (Voluntary)

3 rd Division (of autonomic) Peripheral Nervous System Sensory (Afferent) Motor (Efferent) Somatic (Voluntary) Autonomic (involuntary) Parasympathetic (Rest and Digest) Sympathetic (Fight or Flight)

Sympathetic l l Division of ANS Fight/Flight Antagonist to Para NT: Norepi and Epi

Sympathetic l l Division of ANS Fight/Flight Antagonist to Para NT: Norepi and Epi Parasympathetic l l Division of ANS Rest/Digest Antagonist to Sympathetic NT: ACH

Make this chart Parasympathetic Pupils Saliva Heart rate Lung function Digestion Liver Bladder Adrenal

Make this chart Parasympathetic Pupils Saliva Heart rate Lung function Digestion Liver Bladder Adrenal glands NONE Sympathetic

Mystery Diagnosis l l RSD-1 RSD-2

Mystery Diagnosis l l RSD-1 RSD-2