Nervous System Flashcards
Purpose of the nervous system
Transmits signals between the brain and the rest of the body, including internal organs
(I don’t think we need to know but)
Plays a role is every aspect of our health and well being ie. waking up, breathing, thinking, reading, remembering, and feeling emotions
Types/parts of the system
Central nervous system CNS
Peripheral nervous system PNS
Parts of the CNS
Spinal cord
Brain
Spinal cord
A pathway for nerve impulses to and from the brain, but also a center for operating and coordinating reflex actions independent of the brain
Connects the brain to the PNS starts from the medulla oblong at a and stretches to the lumbar region of the spine it vertebral column
Brain
Most complex and important organ in the body
Found in head protected by skull
Three main parts of the brain
Cerebellum
Encephalic trunk
Brain cortex
Cerebellum
Controls movement balance and coordination
Encephalic trunk
Controls the bodies ability to breath air
Digest food
Circulate blood through body
Brain cortex
Largest and most recognizable
Neurons are housed
Left hemisphere of the brain
Controls right side of the body
Responsible for:
Speech, calculating, and reasoning
Right hemisphere of the brain
Controls the left side of the body
Responsible for:
Intuition, creativity
3 lobes
Frontal lobe
Parietal lobe
Temporal lobe
Frontal lobe
Plan our actions
Feel emotions
Parietal lobe
5 senses
Temporal lobe
Memory
Parts of PNS
Motor nerves
Sensory nerves
Motor nerves
Carry messages in form if a response from the brain on spinal cord (located CNS)
2 types of motor nerves
Lower motor nerves
— travel Spinal chord to muscle
— damage to lower motor neuron cell bodies or their peripheral = paralysis or paresis
Upper motor nerves
— travel brain and spinal cord
4 different sensory nerves
Mechanoreceptors
Thermoreceptors
Nociceptors
Chemoreceptors
Responsible for carrying signals the brain to help you touch taste smell and see
Sensory nerves
Illness
Alzheimer’s
Bells palsy
Alzheimer’s
Build up if certain chemicals and proteins in the brain
Leads to dementia symptoms over time
No cure but some medications and learning new behaviour help symptoms
Bell’s palsy
Sudden weakness or paralysis on one side of the face
Caused my inflammation or damage to facial nerve
Can cause drooping eyelid, difficulty closing one eye, drooling, difficulty eating/drinking
No cure: can go back to normal 2 weeks to 6 months, can go to physical therapy to help
