Parasympathetic Nervous System

It’s what allows you to calm down after being stressed and allows you to digest food, excrete waste, reproduce, and fight off infections

Parasympathetic Nervous System

Majority effector of Parasympathetic Nervous System

Cranial Nerves

How many cranial nerves we have?

12

CN: It takes scent information gathered by the nose and sends it to the brain

CN I (Olfactory)

CN I (Olfactory): S, M, B

S

CN: It takes visual information gathered by the eyes and sends it to the brain

CN II (Optic)

CN II (Optic): S, M, B

S

CN: control 4 of 6 muscles that control movements of your eyes

CN III (Oculomotor Nerve)

CN III (Oculomotor Nerve): S, M, B

M

CN: Controls SIngle muscle of the eye

CN IV (Trochlear Nerve)

CN IV (Trochlear Nerve): S, M, B

M

CN: Branches into 3 main strands and innervates the forehead, face, and jaw muscles

CN V (Trigeminal Nerve)

CN V (Trigeminal Nerve) : S, M, B

B

CN: Stimulate some muscle in your eyes to move laterally

CN VI (Abducens Nerve)

CN VI (Abducens Nerve): S, M, B

M

CN: Operates the muscles that make most facial expressions possible

CN VII (Facial Nerve)

CN VII (Facial Nerve): S,M, B

B

CN: Carries Sensory Information from the cochlea to the brain

CN VIII (Vestibulocochlear Nerve)

CN VIII (Vestibulocochlear Nerve): S, M, B

S

CN: Leads to tongue and pharynx

CN IX (Glossopharyngeal Nerves)

CN IX (Glossopharyngeal Nerves): S,M, B

B

CN: Controls the heart, Digestive Tract and among other fx

CN X (Vagus Nerve)

CN X (Vagus Nerve): S, M, B

B

CN: Controls the trapzieus and sternocleidomastoid to shrug the shoulders

CN XI (Spinal Accessory Nerve)

CN XI (Spinal Accessory Nerve): S, M, B

M

CN: Controls the movement of the tongue that allows you to swallow and talk

CN XII (Hypoglossal nerve)

CN XII (Hypoglossal nerve): S, M, B

M

This CN wanders down to various visceral organs like heart, llungs, stomach, intestine

Vagus Nerve

rate of action potential travelling down through the 2 division of autonomic nervous system

Sympathetic and Parasympathetic Tone

It is mostly dominant to keep Sympathtic Nervous System at bay

Parasympathetic Tone