Nervous System Central Nervous System Brain Spinal Chord

Nervous System

Central Nervous System

Brain Spinal Chord

Peripheral Nervous System

5 Spinal Plexuses Cervical Plexus Thoracic Plexus Lumbar Plexus Sacral Plexus Coccygeal Plexus

Neuron Cell Body Dendrites Nucleus Axon Schwann/ Oligiodendroglia Cell Myelin Sheath Nucleus Axon Terminals Node of Randvier

Chemical flow of ions in/out of neuron Potassium In

Potassium Out

I. Olfactory - In charge of smell; sensory response

II. Optic - In charge of vision; sensory response

III. Oculomotor - In charge of eye movement (motor response), and dilation (parasympathetic)

IV. Trochlear - In charge of eye movement; motor response

V. Trigeminal - In charge of chewing (motor response), and mouth senses (I. e. heat, cold) (sensory response)

VI. Abducens Eye Abducens Nerve - In charge of eye movement (motor response)

VII. Facial - In charge of anterior 2/3 of tongue for taste (sensory response); Facial expressions (motor response); Salivation (parasympathetic response)

VIII. Vestibulocochlear/Acoustic Medulla Acoustic Nerve Inner Ear - In charge of hearing (sensory response); balance (parasympathetic response)

Semilunar Canals Vestibular Cochlear Nerve Pinna Cochlea External Auditory Canal Malleus Incus Stapes Eardrum

IX. Glossopharyngeal - Posterior 1/3 of tongue (taste)/tongue sensation (sensory); tongue movement/larynx control (motor); swallowing/blood pressure (parasympathetic)