Lecture+4+Neurophysiology

Lecture+4+Neurophysiology - Neurophysiology Lecture...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Neurophysiology 125:315 Spring 2011 Minoosh Moradi [email protected] Neurophysiology Lecture Overview s Fundamentals of the Nervous System b Central Nervous System (CNS) s Brain anatomy s Spinal cord anatomy b Peripheral Nervous System (PNS) s Afferent division s Efferent division s Somatic s Autonomic s Control of the Heart and Vascular System s Fitt’s Law s Neurophysiology Lab Protocol Central Nervous System (CNS) s Contains the brain and spinal cord s Critical structures needed for body function and regulation (breathing, HR, pulse, hunger, etc) s Forms of Brain Activity/Involvement b Voluntary (conscious) s Cerebral Cortex is the conscious area of brain b Involuntary (subconscious) s Regions below Cerebral Cortex generally subconscious Basic Brain Anatomy s Forebrain b Cerebrum s Divided into two hemispheres (R and L) s Four lobes (frontal, parietal, occipital, temporal) b Diencephalons s Thalamus (receives sensory info, sends to cerebral cortex) s Hypothalamus (homeostatic regulation, thirst/hunger, sleep, temperature, etc) s Brainstem b Deals with involuntary activities (ie. breathing, HR, BP) b Regions s Midbrain s Pons s Medul a oblongata b Relay center for all nerve fibers (tracts) s Cerebellum b Coordinates movement b Controls balance, posture PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Brain Spinal Cord s Major pathway between brain and PNS s Divided into five sections b Cervical b Thoracic b Lumbar b Sacral b Coccyx • Afferent fiber groups enter spinal cord via dorsal root (dorsal side) • Axons of efferent neurons leave spinal cord via ventral root Peripheral Nervous System (PNS) s Neurons in PNS transmit signals between CNS and receptors/effectors throughout body s Afferent Pathways: transmit information from sensory receptors to CNS s Efferent Pathways: transmit information from CNS to muscles or glands Afferent and Efferent Divisions s Afferent Division b Somatic sensory b Visceral sensory b Special sensory s Efferent Division b Somatic Nervous System: controls organs under voluntary control (ie. muscles) b Autonomic Nervous System: controls homeostasis and organs under involuntary control s Sympathetic s Parasympathetic s Enteric (controls the gastrointestinal system) PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
Background image of page 2
3 Somatic vs Autonomic Division s Innervates smooth/cardiac muscle, glands, GI neurons s Two-neuron chain between CNS and effector organ s Excitatory or inhibitory S Innervates skeletal muscle S Single neuron between CNS and muscle cell S Leads to muscle excitation only Autonomic Somatic Sympathetic vs Parasympathetic s Fibers leave spinal cord from brain and sacral regions s Major neurotransmitter released pre-to postganglionic neurons: Acetylcholine s Major neurotransmitter released postganglionic neurons to effector cell: Acetylcholine s Fibers leave spinal cord from thoracic and lumbar regions s Major neurotransmitter released pre-to postganglionic neurons: Acetylcholine
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 12

Lecture+4+Neurophysiology - Neurophysiology Lecture...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online