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Spinal Cord and Major Nerves

Spinal Cord and Major Nerves. Ch. 7d. Spinal Cord. Continuation of the Brain Stem 31 pairs of spinal nerves connect to different body parts Send sensory impulses from the body to the brain Send motor impulses from the brain to the body. Spinal Cord. Nerve Plexuses Cervical

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Spinal Cord and Major Nerves

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  1. Spinal Cord and Major Nerves Ch. 7d

  2. Spinal Cord • Continuation of the Brain Stem • 31 pairs of spinal nerves connect to different body parts • Send sensory impulses from the body to the brain • Send motor impulses from the brain to the body

  3. Spinal Cord • Nerve Plexuses • Cervical • Diaphragm & muscles of shoulder and neck • Brachial • Shoulder and arm muscles • Lumbar • Lower abdomen, hip, upper leg • Sacral • Some hip & upper leg, mostly lower leg and foot

  4. Quick Quiz 1 of 4 • Name the four Nerve Plexuses • Describe what would occur if the spinal cord were severed just above the Lumbar Plexus

  5. Major Nerves • Crainal Nerves • 12 Pairs of nerves mostly serve the head • Olfactory Nerves: carry smell and taste sensory impulses to brain • Optic Nerves: carry visual sensory impulses to brain • Oculomotor Nerves: carry motor impulses from brain to eye • Facial Nerves: control facial movement

  6. Quick Quiz 2 of 4 • What do the Olfactory Nerves do? • What nerves make the eyes move?

  7. Major Nerves • Body Nerves • Median Nerve • Runs from Brachial Plexus all the way down the arm to the wrist • Sciatic Nerve • Large Nerve from Sacral Plexus runs all the way down the back of the leg • Femoral Nerve • Large nerve in hip that branches out to several smaller nerves in leg

  8. Quick Quiz 3 of 4 • Where is the Median Nerve located? • Why do you think the femoral nerve is so large?

  9. Autonomic Nervous System • Sympathetic Division • “fight or flight” division • Stress response to increase body activities • Higher blood pressure and heart rate • Parasympathetic Division • “resting and digesting” division • Promotes normal body functions and return to normal. • Conserves Energy

  10. Quick Quiz 4 of 4 • Give an example of a situation that would lead to an sympathetic nervous system response. • What kinds of activities are the responsibility of the parasympathetic nervous system?

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