NERVOUS SYSTEM Flashcards
(37 cards)
Functions of the nvs
- Gathers information from both inside and
outside the body - Transmits information to the processing areas
of the brain and spine - Processes the information in the brain and spine
- Sends information to the muscles, glands, and
organs so they can respond appropriately –
controls and coordinates all essential functions of the body including all other body systems allowing the body to maintain homeostasis or its delicate balance
HOMEOSTASIS
2 main divisions of nvs
- Central Nervous System
2. Peripheral Nervous System
consists of the
brain and spinal cord.
Central Nervous
System
plays a central role in the control of most bodily
functions, including awareness, movements,
sensations, thoughts, speech, and memory.
BRAIN
what kind of info is the CNS responsible for?
sensory information
serves as a conduit for signals between the brain and the rest of the body. It also controls simple musculoskeletal reflexes without input from the brain.
SPINAL CORD
Conveying motor commands to all voluntary striated muscles in the body
PERIPHERAL NERVOUS SYSTEM
2 major systems of PNS
AUTONOMIC & SOMATIC NERVOUS SYSTEMS
control system that acts largely unconsciously and regulates bodily functions,
such as the heart rate, digestion, respiratory rate, pupillary response, urination, and sexual arousal.
Autonomic nervous system
prepares the body for the “fight or flight” response during any potential danger
SYMPATHETIC NS
inhibits the body from overworking and restores the body to a calm and composed state.
PARASYMPATHETIC NS
part of the peripheral nervous system associated with the voluntary control
of body movements via skeletal muscles.
SOMATIC NS
what sensory division transmits impulses from peripheral organs to
the CNS?
afferent
what sensory division transmits impulses from the CNS out to the peripheral organs to cause an effect or action.
efferent
coordination of movement and aspects of motor learning.
CEREBELLUM
conscious activity including perception, emotion, thought, and planning
CEREBRUM
Brain’s switchboard – filters and then relays
information to various brain regions
THALAMUS
vital reflexes as heart beat and respiration
MEDULLA
– medulla, pons, and midbrain (involuntary
responses) and relays information from spine to upper brain
Brainstem
– involved in regulating activities internal organs,
monitoring information from the autonomic nervous system,
controlling the pituitary gland and its hormones, and regulating
sleep and appetite
HYPOTHALAMUS
uses serial x-rays to
visualize intra and extra cranial blood
vessels. This procedure is used to detect
vascular lesions and tumors.
Cerebral Angiography
• is a surgical procedure which involves the removal of a portion of the skull.
Craniectomy
involves making an incision in the scalp
and creating a hole known as a bone flap in
the skull.
Craniotomy