Exam 4 Flashcards
Functions of nervous system
- Collects information
- Processes and evaluate information
- Initiate response to information
CNS
Brain and spinal cord
PNS
nerves and ganglia
Dendrites
Input
Area where neuron receives incoming information
Axon Hilloc
Output
Location where action potentials are initiated
Synapse
Communication
Site of communication with target cell
Axon
OUtput
Cell body
Integration
Contains cells organelles
Nucleus
Contains DNA
Sensory neurons
Afferent neurons
Conduct input from somatic and visceral receptors to CNS
Motor neurons
efferent neurons
conduct output from CNS to somatic and visceral effectors
Interneurons
Association neurons
Receive, process, and integrate information from many other neurons
Communicate between sensory and motor neurons; located within CNS
Frontal lobe
Voluntary skeletal motor control, higher cognitive functions
Parietal lobe
Somatic sensory processing
Occipital lobe
Visual processing
Temporal lobe
Auditory processing, olfactory processing
Broca’s Area
motor production of speech
Wernicke’s area
understanding of written and spoken language
Corpus callosum
Interconnect left and right hemispheres of cerebral cortex to allow information sharing
Thalamus
Relays sensory information from periphery to cortex
Hypothalamus
Regulates emotions, autonomic functions, hormone production
Hippocampus
Memory storage
Pituitary gland
Production of hormones, regulation of other endocrine glands
Olfactory nerve
CNI
Smell
Sensory
Optic nerve
CNII
Vision
Sensory
Oculomotor
CN III
Eye movement
Motor
Trochlear
CN IV
Eye movement
Motor
Trigeminal
CN V
Sensory and motor info to/from face
Both
Abducens
CN VI
Eye movements
Motor
Facial
CN VII
Sensory and motor info to/from face
both
Vestibulocochlear
CN VIII
Balance and equilibrium, hearing
Sensory
Glossopharanygeal
CN IX
Sensory and motor info to/from head and neck
Both
Vagus
CN X
Sensory and motor info to/from thorax and abdomen
Both
Accessory
CN XI
Muscles of neck and upper back
Motor
Hypoglossal
CN XII
Tongue movements
Motor
Somatic division
part of motor division responsible for conscious or voluntary control of skeletal muscles and reflexes
Autonomic division
part of motor division responsible for automatic or involuntary responses
Neuroglia
cells of nervous system that insulate, support, and protect delicate neurons
Cerebral cortex
Outermost layer of cerebrum composed of gray matter, responsible for thinking and processing info from five senses
White matter
Unmyelinated and tightly packed neuron cell bodies
Brain stem
connects brain to spinal cord; 3 areas are midbrain, pons, and medulla oblongata; controls breathing, heart rate, and blood pressure
Cerebellum
Section of brain with parallel surface grooves, inferior to occipital and temporal lobes, responsible for balance, equilibrium, and coordination
Monitors/adjusts postural muscles
Pons
Relay sensory info to thalamus and cerebellum
Regulate reflexive visceral and motor activities
Medulla Oblongata
Relays sensory info to thalamus and brain stem
Autonomic centers for visceral activities
