Peripheral Nervous System (PNS)

• The Peripheral Nervous system is responsible for the control of the muscles and glands
• Carries information from the sensory and internal organs to the CNS
• Conveys info from the CNS to the muscles, organs, and glands.
• The Somatic Nervous System (SNS) is a subdivision of the PNS. It controls the skeletal muscles attached to bones and transmits sensory information to the CNS.
• The Autonomic Nervous System (ANS) is another division of the PNS that regulates involuntary actions such as heart rate, digestion, breathing, etc.
• The ANS has two divisions: Sympathetic NS and Parasympathetic NS
• Sympathetic NS prepares us for action by increasing blood pressure, heart rate, respiration, and pupil dilation.
• The Peripheral Nervous System includes everything outside of the CNS.
• SAME stands for Sensory Arrive, Motor Exits
• The somatic nervous system controls voluntary movements and sensations from our environment.
• The autonomic nervous system controls involuntary functions like heartbeat, digestion, and breathing.
• Sympathetic division prepares us to respond to stressors or threats by increasing activity in organs that are important during fight-or-flight situations.
• Parasympathetic division restores normal body function when we're not under threat.
• The Somatic Nervous System has two divisions: motor and sensory
• Motor is Efferent
• Sensory is afferent
• Afferent means to carry sensory information from receptors in skin/other organs to the CNS.
• Efferent means to carry motor information from the brain to the peripheral nervous system.
• Afferent= sensory information to the brain (CNS)
• Efferent = Motor information away from the brain (CNS)
• Somatic Nervous System controls voluntary movements, such as walking or writing.