PS267 Lecture Notes - Lecture 3: Somatic Nervous System, Autonomic Nervous System, Peripheral Nervous System
Structure and Function of the Nervous System
JUST DO MACROSTRUCTURES
The nervous system is generally divided into two main parts:
● The central nervous system: brain (including the 12 pairs of cranial nerves) and spinal
cord
● The peripheral nervous system: sensory and motor nerves (31 pairs) and associated
nerve cell ganglia
○ Peripheral nervous system has two divisions: the somatic nervous system and
the autonomic nervous system
○ Somatic nervous system brings messages from the senses to the central
nervous system and sends motor signals to the muscles
○ Autonomic nervous system consists of neurons that control the heart, intestines,
and other organs
● The autonomic nervous system consists of neurons that control the heart, intestines, and
other organs
● Autonomic nervous system has two divisions: sympathetic and parasympathetic
● This system is often associated with the 4 F’s: fight, flight, and fear, f…
Navigating the Human Brain
● Anterior / rostral: front
● Superior: above
● Inferior: below
● Posterior / caudal: behind (tail/rear)
● Dorsal: back or top side
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Document Summary
The nervous system is generally divided into two main parts: The central nervous system: brain (including the 12 pairs of cranial nerves) and spinal cord. The peripheral nervous system: sensory and motor nerves (31 pairs) and associated nerve cell ganglia. Peripheral nervous system has two divisions: the somatic nervous system and the autonomic nervous system. Somatic nervous system brings messages from the senses to the central nervous system and sends motor signals to the muscles. Autonomic nervous system consists of neurons that control the heart, intestines, and other organs. The autonomic nervous system consists of neurons that control the heart, intestines, and other organs. Autonomic nervous system has two divisions: sympathetic and parasympathetic. This system is often associated with the 4 f"s: fight, flight, and fear, f . The coronal plane shows brain structures as they would be seen from the front. Subcortical features aka what is under the hood.
