Diapositiva 1

Apuntes

[Diapositiva 1] The Autonomic Nervous System [Diapositiva 2] 2 ANS Efferent visceral motor Only modulate Visceral reflexes Effectors: Smooth muscle Cardiac muscle Glands [Diapositiva 3] Somatic Motor Vs. Visceral Motor Effector Cells and Nerve Fibers [Diapositiva 4] Somatic motor 4 [Diapositiva 5] Autonomic motor 5 [Diapositiva 6] ANS-2 divisions; similar innervations; different effects 6 Parasympathetic “Rest and digest” Controls basic maintenance; conserves body energy Craniosacral (S2-S4 and cranial nerves III, VII, IX, X) Sympathetic “Fight or flight” Extra metabolic effort needed Thoracolumbar division (T1-L2) Dynamic counteraction [Diapositiva 7] 7 Common properties to Sympathetic and Parasympathetic systems Both have a two neuron chain Both divisions have a “way station” for the first neuron to make connection at a ganglion Preganglionic neuron Postganglionic neuron Preganglionic cell releases ACh as neurotransmitter [Diapositiva 8] 8 [Diapositiva 9] 9 Differences of Sympathetic and Parasympathetic Divisions Location of preganglionic cell bodies; (all in CNS- but in different areas) Sympathetic-lateral horn(T1-L2) Parasympathetic- Lateral horn (S2-S4) and crania...