1 / 21

CELL PHYSIOLOGY (Neuron)

CELL PHYSIOLOGY (Neuron). ANATOMY OF A SYNAPSE (Synaptic Knob and Motor End Plate). CELL MEMBRANE. ACTION POTENTIAL. CENTRAL NERVOUS SYSTEM. Sensorimotor cortex Basal ganglia Cerebellum Brain stem Spinal cord Pyramidal tract Extrapyramidal tract. TYPES OF NEURONS.

chaim
Télécharger la présentation

CELL PHYSIOLOGY (Neuron)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CELL PHYSIOLOGY (Neuron) IE 552

  2. ANATOMY OF A SYNAPSE(Synaptic Knob and Motor End Plate) IE 552

  3. CELL MEMBRANE IE 552

  4. ACTION POTENTIAL IE 552

  5. CENTRAL NERVOUS SYSTEM • Sensorimotor cortex • Basal ganglia • Cerebellum • Brain stem • Spinal cord • Pyramidal tract • Extrapyramidal tract IE 552

  6. TYPES OF NEURONS IE 552

  7. SARCOPLASMIC RETICULUM IE 552

  8. EXCITATION-CONTRACTION SEQUENCE #1 • AP moves down neuron • Release of ACH across synapse, receptor • Motor end plate P → muscle action P • SR releases Ca++ into filaments • Inhibits troponin • ATP split: ATP∙M → ADP∙Pi∙M • A M bonding: ADP∙Pi∙M → A-M∙ADP∙Pi IE 552

  9. EXCITATION-CONTRACTION SEQUENCE #2 • ATP split completely leaving bridge A-M∙ADP∙Pi → A-M + ADP + Pi • Break AM bond with fresh ATP A-M + ATP → A + M∙ATP • Myosin advances to next actin, repeat • Relaxation, Ca++ released from troponin • Ca++ back into SR using ATP IE 552

  10. MOTOR UNIT RECRUITMENT IE 552

  11. MOTOR UNIT CHARACTERISTICS IE 552

  12. TWITCH AND TETANUS IE 552

  13. LENGTH-TENSIONRELATIONSHIP (Active) IE 552

  14. LENGTH-TENSIONRELATIONSHIP (Passive) IE 552

  15. LENGTH-TENSIONRELATIONSHIP (Combined) IE 552

  16. VELOCITY-TENSION RELATIONSHIP • Concentric • Eccentric • Isometric • ↓ bonding • Damping • Peak power = ⅓ vmax IE 552

  17. TYPES OF CONTRACTIONS • Static (Isometric) = constant muscle length • Dynamic = muscle length changes • Concentric = muscle shortens • Eccentric = muscle lengthens • Isotonic = constant external force • Isokinetic = constant velocity • Isoinertial = constant acceleration IE 552

  18. QUICK RELEASE EXPERIMENTS(#1 - Defines Active State) IE 552

  19. QUICK RELEASE EXPERIMENTS(#2 – Series Elastic Component) IE 552

  20. HILL’S 4-ELEMENT MODEL IE 552

  21. ENDURANCE CURVES • Voluntary hold • Static contraction • Occlusion of blood flow • Rapid fatigue • T = 1236 - 72.5 (%MVC-15)0.618 IE 552

More Related