Ok so this is my 20th PPT of the series dedicated to the Human Anatomy. The humor is mine. So just change it to fit your needs. Hope this helps.

1. Chapter 6 The Muscular System Disclaimer: Included in this presentation are pictures you will not find in your book, make note of the information and move on. Working smarter is not working harder.

2. Muscle Lecture 2 Motor Neuron pathways and Body Movements

3. Motor Unit: Basic A Motor Unit is basically: The combination of Nerve + Muscle bundle. But what about the BRAIN? I’m so glad you asked…

4. Motor Unit + Brain (CNS) So here we have added the BRAIN. It tells the Muscle to “React” REACT= Contract So what Tells the Brain to React? I’m so glad you asked…

5. Motor Unit: Sensory neuron + Brain + Motor Neuron Sensory Neurons tell the Brain to react. Which then tell the Motor Neuron to go into action So how fast is the stimulus that triggers a Motor Unit? I’m so glad you ask…

6. Motor Unit: Nerve Impulse Nerve impulses travel at 170 mph or 200 m/s Meaning: Things happen quick

8. Motor Unit: Neurotransmitters The Nerve Impulse reaches the Neuromuscular junction (where the nerve meets the muscle). Ach = acetylcholine is released This crosses the space called “synaptic cleft” Hits the muscle fiber receptors and causes a CONTRACTION Then Ach is broken down and the muscle RELAXES

9. Motor Unit: Action Potential Ok so this is …what?!?!?! In real terms the Action Potential is simply: The amount of stimulus to trigger a Sensory  Motor Response It is all-or-nothing

10. Motor Unit: Action Potential In action…. Hold please while I get out the needle. Just Kidding…

12. Body Movements: Flexion Dedicated to all my Twilighters Flexion: Closing the angle of a joint |  closed  |

13. Body Movements: Extension Extension: The act of straightening or extending a limb. Personally I don’t like definitions that have the word their defining in them, but…I think you get the point. Ways I say “Hello”

14. Body Movements: Rotation Turn your head left Turn your head right =ROTATION Ok now I’m going to do something alittle extreme now… Hold please.

15. Body Movements: Adduction Adduction: Movement toward the midline of the body

16. Body Movements: Abduction Abduction: The act of moving a body away from the planet to be anally probed by curious aliens. Wait…WHAT?!?!?! NEXT SLIDE!!!!

17. Body Movements: Abduction Abduction: The movement of a limb away from the midline of the body.

18. Body Movements: Circumduction Circumduction: Moving a limb in a circular motion ~still attached to the body~