Central and Peripheral Nervous System

What are the two types of Peripheral Nervous Systems

1.) Autonomic Nervous System

2.) Somatic Nervous System

What are the N.S. within the Autonomic Nervous System

Sympathetic (mobilizes)

Parasympathetic (conserves)

what does the sympathetic nervous system do

• heart beats faster

• blood pressure rises

• bronchial tubes open up

• saliva increases

what does the parasympathetic nervous system do

• heart rate decreases to normal

• blood pressure decreases

• bronchial tubes to normal

• saliva decreases to normal

What are the two N.S. within the somatic nervous system

Afferent (body to brain)

Efferent (brain to body)

what is the afferent nervous system

sensory neurons

what is the efferent nervous system

motor neurons

what do the Sympathetic and Parasympathetic NS do combined

They work together as

Sympathetic readies body for NOREPINEPHRIBE

Parasympathetic returns body to normal GABA

What are the 3 sections of the brain

Hindbrain

Midbrain

Forebrain

what is located in the hindbrain

• cerebellum

• pons

• medulla

• brain stem

what does cerebellum focus on

movement and balance

what does pons focus on

connects the hindbrain with the medulla+ midbrain

what does the medulla focus on

attaches to the spinal cord and controls unconscious functions like circulating blood, breathing, and salivating. 

what is inside the brain stem

comprised of the medulla, pons and midbrain

What is in the Midbrain

Reticular formation

what is reticular formation

• groups of fibers that carry stimulation related to sleep and arousal through the brainstem.

• Integrates sensory functions like vision, speech and hearing

what is located in the forebrain

• Thalmus

• Limbic System

• Amygdala

• Hippocampus

• Hypothalamus

what does the thalamus focus on

it’s the relay center of clusters of somas that relay sensory information from the cortex.

what does the hypothalamus focus on

regulates basic biological needs:  regulates the autonomic n.s.; survival flight/fight; regulates hunger, sleep (busy body of the brain)

What is the Limbic System

a group of interconnected brain structures that help regulate your emotions and behavior

what is the amygdala

It’s linked to emotions like fear and aggression

what is the hippocampus

involved in learning and memory

What is the second part of the Central Nervous System

Spinal Cord

What is and what occurs in the Spinal Cord

• Connects the brain to the body through the peripheral nervous system.

• It is enclosed in the meninges (3 layers of membranes) containing cerebral-spinal fluid that flows up the spinal cord into the brain and back down again like a pum