Ch4_ppt_-_Brain_and_Behavior_Compatibility_Mode_

G heart respiration controls glands eg stress

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Unformatted text preview: neurons send m essages from brain & spinal cord to muscles controlling voluntary m ovements) Autonomic Nervous System (senses body’s internal functions (e.g. heart, respiration), & controls glands (e.g. stress response); smooth involuntary m uscles/ functions) Sympathetic (generally activates) Parasympatheti c (generally inhibits) 29 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 10/28/2009 Autonomic Nervous System Parasympathetic NS slows slows down body processes & maintains state of of tranquility Sympathetic NS activation/arousal activation/arousal function & acts as a total unit (e.g. fight-or-flight response) fight Both Both work to maintain Homeostasis (delicately balanced & constant internal state) Homeostasis Central Nervous System Brain Spinal Cord most nerves enter/leave CNS Some simple stimulus-response Some simple response sequences - spinal reflexes - can be can triggered at spinal cord level without brain involvement (less reaction reaction time) 30 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 10/28/2009 NERVOUS, NERVOUS, ENDOCRINE, & IMMUNE SYSTEM ARE PARTS OF A COMMUNICATION NETWORK NETWORK Nervous System Immune System Endocrine System NS & the Endocrine System The Endocrine The Endocrine System (ES): consists of numerous hormone-secreting secreting glands glands distributed throughout body to convey information thru: Hormones: chemical messengers secreted from glands into bloodstream with chemical specific receptors [Neurons certain receptors for neurotransmitters; Cells certain certain receptors for hormones] Endocrine messages Endocrine messages trigger responses in brain & vice versa e.g. e.g. negative thoughts/stressful situation Stress Stress hormones Endocrine Endocrine system SLOWER than nervous system (depends on blood flow) flow) Hormones Hormones influence development: Sex hormones sex organ sex development, aggressiveness (men > women) & longevity (women > men), brain brain structures 31 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 10/28/2009 NS & The Immune System The Immune System consists of microscopic soldiers on consists search destroy search-&-destroy mission, with innate ability to differentiate between between bodily & foreign substances It overcomes antigens: foreign substances (antibody foreign generators like bacteria, viruses,…) that trigger a biochemical response response from immune system Immune Immune system has remarkable memory recognize recognize antigen immediately produce biochemical weapons produce (antibodies); that’s why vaccines are used It receives, interprets, & responds to different stimulations NS & The Immune System Stimulation/destruction Stimulation/destruction of part of hypothalamus & cerebral cortex immediate ↑/↓decrease in immune system activity immediate ↑/↓ Action Action of immune cells can be directly influenced by brain messengers messengers Immune Immune cells can produce hormones & neurotransmitters directly influence brain & ES Ψcial factors: chronic stress, depression, & pessimistic cial thinking ↓ immune functioning Stress-management skills, optimistic outlook, sense of management humor, & social support preserve immunity 32 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 10/28/2009 The The Nervous System, Endocrine System, and Immune System form a complete communication loop, with each influencing and being influenced by the other other Nervous System Immune System Endocrine System 33 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com)...
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