Spinal Cord & Nerves Ch 13.

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Presentation transcript:

Spinal Cord & Nerves Ch 13

The Spinal Cord

Peripheral Nervous System cranial nerves- 12 pr spinal nerves- 31 pr

The Spinal Cord white matter grey matter dorsal root pia mater ventral root pia mater spinal nerves arachnoid dura mater

The Spinal Cord vertebra spinal cord spinal nerve

Nerve Pathways into the Spinal Cord sensory pathway motor pathway

Neuron-To-Neuron Transmission synapses Interaction Between Neurons

Spinal Nerves

Spinal Nerves

Cervical Plexus

Brachial Plexus

Lumbar Plexus

Sacral Plexus

Functional Divisions of the Peripheral Nervous System Afferent Division Sensory (advances) neuron – goes toward CNS Efferent Division Motor (exits) neuron- leaves CNS Somatic Nervous System Autonomic Nervous System A Typical Motor Neuron

Spinal Reflex Arc sensory neuron motor neuron stretch receptor interneuron stretch receptor motor neuron patellar ligament Spinal Reflex Arc