nervous

• the brain is soft, spongy nerve tissue that control all body functions
• what are the brain's three main parts?

  cerebrum, cerebellum, brain stem
• what are the three parts of the brain stem?

  medulla oblongata, pons, midbrain
• the brainstem controls all involuntary actions and maintains homeostasis
• since the brainstem handles involuntary actions, which system does it work directly with?

  autonomic
• the cerebellum is below the cerebrum and handles complex movements, balance, and coordination
• what are the four lobes of the cerebrum?

  frontal, parietal, temporal, occipital
• the frontal lobe controls all executive functions like reasoning, judgement, decision making, and ability to learn
• the frontal lobe only matures fully when you are 25 years old
• the frontal lobe has cortex near the surface that controls all simple movements
• the cerebrum is split into four lobes and two hemispheres
• the Bronca's Area in the frontal lobe controls speech output and is in the left hemisphere
• the temporal lobe is found on the sides of cerebrum
• the temporal lobe controls your sense of sight and hearing
• the temporal lobe controls your short-term memory and speech input
• the occipital lobe controls all visual processing
• the occipital lobe is found in the back of the cerebrum
• the parietal lobe is found at the top of the cerebrum
• the parietal lobe controls your sense of taste and touch, and spacial awareness
• the parietal lobe controls your language and vocabulary
• the Wernicke's area in the parietal lobe helps you choose what you are going to say
• the brain stem also connects the brain to the spinal cord
• the nervous system splits into two other systems called the central NS and the peripheral NS
• the CNS consists of the spinal cord and the brain
• the PNS consists of nerves
• the spinal cord is a 15-20x.5 cord that is a bundle of nerves that connects the brain to the body
• the spinal cord forms 31 pairs of spinal nerves that send and receive information to and from all parts of the body
• spinal never pairs are made of sensory neurons and motor neurons
• the PNS breaks down again into two smaller systems: the somatic NS and the autonomic NS
• the ANS divides further into two other systems called the sympathetic NS and the parasympathetic NS
• the SANS main motto is "fight or flight"
• the PANS main motto is "rest and digest"
• the nervous system is a pathway in which the brain uses to send and receives signals about what is happening in and around the body
• the brain is protected by the skull which is a irregular bone
• the PNS main function is carrying messages to and from the body to the CNS through nerves
• the SNS sends information to your CNS through sensory neurons and responds using the motor neurons to send messages back to senses
• sensory neurons travel inwards, require a stimuli, and go from the sensory organs to the brain or spinal cord
• motor neurons travel outwards, is a response, and goes from the brain and spinal cord to the skeletal muscle
• the SNS is a stimulus response system where the stimulus comes thought sensory organs and the response comes from skeletal muscle
• the ANS controls the involuntary processes within your body