Peripheral Nervous System: Sensory and Motor Neurons
Sensory Neurons: Neurons that transmit information from the periphery to the CNS.
Motor Neurons: Neurons that transmit information from the CNS to the periphery.
Spinal Cord Sections:
Cervical: head neck and shoulders
Thoracic: back, abdomen and thorax
Lumbar: lower limbs, pelvis, external genitalia
Sacral: thighs, buttocks, anus, legs and feet
Vagus Nerve: cranial nerve that passes through the mid-brain, thorax and abdomen,
regulates vital functions such as heart rate and stomach acid formation.
Vestibulocochlear nerve: Hearing and balance
Vagus nerve: aortic blood pressure, heart rate, stomach acid secretion and taste
Central Nervous System:
Brain: Cerebral cortex, brainstem, and cerebellum
Cerebral cortex lobes: Frontal, Parietal, Temporal and Occipital
Brainstem: life support system of the brain, regulates breathing, heart rate and blood
pressure, connects brain to spinal cord.
Cerebellum: balance and coordination
Autonomic System: Sympathetic and Parasympathetic division
Sympathetic System: Flight or Fight response
Cell body of a neuron: contains nucleus, an endoplasmic reticulum and golgi apparatus
Dendrites: at the cell body, receive information from other nurons
Axon: extends from the cell body, conducts electrical signals to the synapse where
another neuron is met.
Glia: outnumber neurons 3-1, “supportive cells”
Types of Glia: astrocytes, microglia, oligodendrocytes
Astrocytes: maintain proper chemical environment
Microglia: immune cells that remove debris and secrete inflammatory mediators