Notes Flashcards
Nearsightedness
Myopia= can’t see far
Farsightedness
Hyperopia=can’t see up close
CNS
Brain and spinal cord
PNS
Cranial and spinal nerves
PNS afferent: sensory information
Sensory information comes into the nervous system via cranial and spinal nerves (and sensory organs sensory info comes in from sensory organs)
Exteroreceptors (2 types)
Somatic (general): mostly located in the limbs; hand, touch, temp, pain
Special Senses: ex: eyes, ears, and equilibria receptors in the brain
Proprioceptors: positional
Found in muscles and joints. Gives us a sense of the position of our limbs in space
Interceptors: in the core of our body
Senses internal things referred to as visceral senses
Ex: blood pressure changes in the neck stomach pain
How does sensory information come in the body
Sensory info comes in to the body → PNS→ CNS (through spinal cord and/or brain ex: eyes cranial nerves to brain pain is spinal cord to brain)
Ex: hear something: Information is integrated in the brain to make an appropriate command then Send out information efferently then info will spread out 2 different ways (somatic or autonomic)
Somatic: short - skeletal muscle
Activate motor neurons which activate skeletal muscle which is volitional
Autonomic
Efferent subconscious, cant control it,
What are the two divisions
Parasympathetic and sympathetic
What does the divisions control?
These control everything else such as cardiac muscle, smooth muscle glands, beta cells, adipose cells
What can’t the division not control
Can’t control your heart, peristalsis, perspiration, lipolysis
How many cranial nerves?
12 pairs of cranial nerves
