Nervous System Part 2 Flashcards
Pathways that transmit information via action potentials from the peiphery to various parts of the brain
Ascending tracts
Conscious awareness of stimuli
Perception
Deals with pain, temperature, light touch, pressure, tickle, itch sensation
Spinothalamic
Transmits action potentials DEALING WITH TOUCH, POSITION, AND PRESSURE
Dorsal column
Transmits informatiom about body position to the cerebellum; proprioception to the cerebellum
Spinocerebellar
Have cell bodies in the cerebral cortex
Upper motor neurons
Have cell bodies in the anterior horn of spinal cord
Lower motor neurons
Posterior to central sulcus
Primary somatic sensory cortex
Controls voluntary motor movement
Primary motor cortex
Involves in motivation and regulation of emotional behavior and mood
Prefrontal area
Involved in the process of recognition
Association
Pathways that control different types of movement
Descending tract
Responsible for maintaining the body’s posture and balance
Somatic motor system
No conscious thought
Involuntary
Consciously activated
Voluntary
Group of functionally related nuclei
Basal nuclei
Located deep within cerebrum
Corpus striatum
Group of darkly pigmented cells in the midbrain
Substantia nigra
The major function of a cerebellum is that of a ______
Comparator
Connection between two hemispheres
Commisures
The largest commisure
Corpus callosum
A broad band of nerve tracts at the base of longitudinal fissure
Corpus callosum
Involved in functions such as 3D or spatial perception and mysic ability
Right hemisphere
Involved more analytics, mathematic ability, and speech
Left cerebral hemisphere
Another term for sensory speech
Wernicke area
in parietal lobe; functions in understanding and formulating coherent speech
Sensory speech / Wernicke area
Another term for motor speech
Broca Area
Controls movement necessary for speech
Motor speech / Broca area
Electrodes placed on a person’s scalp to record brain’s electrical activity
Electroencephalogram (EEG)
Called the wavelike patterns
Brain waves
Normal person is awake but in a quiet resting state; eyes closed
Alpha waves
Occur during intense mental activity;have higher frequency than alpha
Beta Waves
Occur during deep sleep; in infants and patients with severe brain disorders
Delta waves
Common in children, may occur in adults with frustration or certain brain disorders
Theta waves
Three types of storage of memory
Working
Short term
Long term
Task associated memory that is recquired for immediate performance of task
Working memory
This memory can only last for a few seconds to munutes
Working memory
Can last/retain information for a few minutes to a few days
Short term memory
It can be restored for a few minutes or become permanent by ______
Consolidation
Can store for a few minutes or become permanent
Long term memory
Involves the retention of facts, such as names, dates, and places
Declarative memory / explicit memory
Involves development of motor skills; only small amount of this memory is lost over time
Procedural memory / Reflexive memory
Involve in long term-term retention of a given piece of information
Memory engrams / Memory traces
Protects the brain and spinal cord
Meninges
Three types of meninges
Dura mater
Arachnoid mater
Pia mater
The most superficial and thickest of the meninges
Dura Mater
The space between the dura mater and vertebrae
Epidural space
‘very thin, wispy second layer’ of meninges
Arachnoid mater
Space between dura and arachnoid mater
Subdural space
Very tightly bound to the surface of brain and spinal cord
Pia mater
Space between the arachnoid and pia mater
Subarachnoid space
A space that is filled with cerebrospinal fluid (csf) and contains blood vessels
Subarachnoid space
Spinal block
Anesthesia
Spinal tap
Take a sample of cerebrospinal fluid
Fluid filled cavities of CNS
Ventricles
Bathes and provides cushion around the cns
Cerebrospinal fluid
What plexus produces the cerebrospinal fluid?
Choroid plexus
How many cranial nerves?
12
Vision
Optic
Smell
Olfactory
4-6 extrinsic eye muscle; contricts pupil
Oculomotor
One extrinsic eye muscle
Trochlear
Abducens
Sensory to face and teeth; motor to muscles of mastication (chewing)
Trigeminal
Hearing and balance
Vestibulocochlear
Facial expression , taste, tears, salivqry
Facial
Touch to back of tongue
Glossopharyngeal
S: pharynx, larynx, and viscera
Vagus
Move to two neck and upper muscles
Accessory
Motor to tongue muscles
Hypoglossal
Divided into special senses (vision) and more general senses
Sensory function
Subdivided into somatic motor and parasympathetic
Motor function
Consists of motor neurons that carry action potentials from cns to periphery
Autonomic nervous system
Flight or fight
Sympathetic
Prepares the body for physical activity
Sympathetic
Read and digest
Parasympathetic
Stimulates involuntary activities of body at rest
Read and digest / parasympathetic
Plexuses within the wall of the digestive tract
Enteric nervous system
Absent or defective speech or language comprehension
Aphasia
Bleeding into the subdiral space
Subdural hematoma
Accumulation of csf in the ventricles
Hydrocephalus
Known as cerebrovascular accident (cva) that results to tissue
Stroke