Cumulative Final Flashcards
What is included in the CNS?
The brain and the spinal cord
Where is gray matter in the brain?
it forms the cortex-the outside of the brain
Where is white matter in the brain?
in the medulla -inside the brain deep to the cortex
What are the ventricles of the brain?
the hollow portions of the brain filled with CSF
The cortex of the spinal cord is composed of ____ matter
white
in central cavity of the spinal cord is surrounded by ___ matter
grey
what cells are responsible for producing CSF?
ependymal cells
What is the function of the chorid plexis
activitly pumps sodium cations into the ventricles from the blood.
CSF is similar to blood minus the _____
proteins
The largest section of the brain is called the _____
cerebrum
What are the three regions of the cerebrum?
the cortex, medulla, and the basal nuclei
What are the functions of the cerebrum?
Perceives sensations, initates movment, memory, thought, reason, and emotion
What are gyri in the brain?
curves
what are sulci in the brain?
grooves
the two hemispheres of the cerebrum are connected by the?
corpus callosum
What are the associated traits of the right hemisphere of the cerebrum?
artistic
What are the associated traits of the left hemisphere of the cerebrum?
reasoning, logic
what are the five main lobes of the cerebrum?
FPTOI
Frontal parietal temporal occipital insula
What are the functions of the frontal lobe?
voulntary movement
analyze sensory info
personality
What are the functions of the parietal lobes?
sensory responce
speech reconition
emotion expression
What are the functions of the temporal lobes?
auditory sensations, visual and auditory memory
what are the functions of the Occipital lobes?
Visual sensations and integration
What are the functions of the insula lobe?
possibly memory
What are the two cerebral layers?
the cortex and the medulla
What are the three types of functional areas in the cortex?
Motor
Sensory
association
What are the four main motor areas in the cortex?
PPBF
Primary (somatic) motor cortex
premotor cortex
Broca’s area
Frontal eye field
What is the function of association areas?
they integrate diverse information
What is the function of sensory areas?
they all conscious awareness of sensation
In what lobe of the brain can the primary and pre motor cortex be found?
the peritial lobe
What is the function of the primary motor cortex?
Conscious control of precise, skilled, voluntary moments
What is the function of the pre-motor cortex?
it controls learned repetitious, patterned motor skills
Coordinates simultaneous or sequential actions
*staging area for skilled motor activities
Plug phone in behind desk
Where is the broca’s area located?
on only one hemisphere usu. left on the front portion of the temporal lobe
What is the function of the brocas area?
It is the Motor speech area. It directs the muscles of the tongue
When is the brocas area active?
when one is about to speak
What portion of the brain allows voluntary eye movement?
the frontal eye field
What is the function of the primary somatosensory cortex?
Receives information of the skin and skeleton
allows for spatial discrimination
it is contralateral-left associated with right vice versa
What is the function of the Somatosensory association cortex?
It integrates sensory information
forms comprehensive understanding of stimulus
determines size, texture, relationship
*horse vs Dog
What are the functions of the visual sensory areas?
THey receive and interpret information from retinas
Primary visual cortex-largest sensory area
Visual association area-interprets color, form, moment
What are the three major auditory areas?
Primary auditory cortex
Auditory asssociation area
wernickes area
What is the function of the primary auditory cortex?
allows you to interprets pitch, location, and loudness
What is the function of the auditory association area?
Stores memories of sounds and permits perception of sounds
What is the function of wernickes area?
allows us to understand written and spoken language
What is the function of the vestibular cortex?
Located in the?
Balance/head position
insula
What is the function of the olfactory cortex?
location?
Smell
medial temporal lobes
What is the gustatory cortex?
location?
Taste
insula
What is the function of the visceral cortex?
stretch receptors
full stomach/bladder
cramping
What is the function of the anterior/prefrontal cortex?
Intellect, cognition, recall, personality
What is the function of the posterior association area?
Patterns and faces
self and spatial relationships
What is the function of the limbic area?
Emotion impacts of information RED PEN
What are the three was that the brain communicates within itself?
Comissures
Association fibers
Projection fibers
What are commissures?
Connection of areas of grey matter from seperate hemispheres
What is an example of a commissure?
The corpus Callosum
What are association fibers?
fibers that connect different parts of the same hemispheres
What are projection fibers?
fibers that connect from the hemispheres and the lower brain/spinal cord
What are the four major portions of the diencephalon?
the thalamus
the hypothalamus
the epithalamus
Corpora quadrigemina
What are the functions of the thalamus?
It is the sensory relay center
responsible for autonomic responses to intense pain
What ventricle does the thalamus encompass?
the third ventricle
What are some of the functions of the hypothalamus?
Homeostatic control
Controls hormone producing glands
What are some functions of the epithalamus?
Contains the pineal gland-produces melatonin
contains the choroid plexus-secretes-CSF
What are the two portions of the corpora quadrigemina?
The superior colliculi and the inferior colliculi
What is the function of the Sup, Colliculi?
it is involved in reflexes movments of the head and body towards stimuli
Startle responce
What is the function of the inferior colliculi?
It is an integral part of auditory pathways in the CNS passes imput into the Sup. Colliculi
What are the three regions of the brain stem?
The midbrain
the pons
the medulla oblongata
How many of the 12 cranial nerves connect to the brainstem?
10
What is the function of the midbrain?
It contains the Cerebral peduncles
cerebral aquedect
and various nuclei
What is the function of the pons?
It is composed of white matter tracts
connects cerebellum and Mo, Sends motor impulses
Assists medulla in breathing regulation
associated with sleep and arousal
Wat is the function of the medulla oblongata?
Controls vital functions and reflex control
What are the white matter tracts of the cerebellum called?
the arbor vitae
What is the function of the cerebellum?
Coordinates balance, eye movments, controls posture, locomotion, fine motor skills
What are the two major types of sleep?
REM and Non-REM
How many stags of sleep are there?
4
The most restorative stage of sleep are the ___wave states
Slow
What are the three principles of memory?
Storage
Processing
Memory traces
Where does memory processing occur?
the hippocampus
Hippos go to university to learn and process memory
What are the three layers of the Brain meninges?
THe dura mater
The Arachnoid mater
the Pia mater
What is the blood-brain barrier?
The protective mechanism that maintains a stable environment for the brain
What are the three aspects of the epitheial tissue that form the blood-brain barrier?
CTF
The continous endothelium of capillaries
the thick basal lamina
the feet of the brains astrocytes
The BBB is ineffective agains substances that can diffuse through what membrane?
Plasma membranes
Give two examples of substances that can pass the BBB
Hormones and Lipophilic substances alcohol, other drugs
Where is the BBB absent?
The hypothalamus
What can increase the ability of chemicals to pass the BBB?
Stress
The epidural space is the space between the _____ and the _____
vertebrae and the Dural sheath
What fills the Epidural space
Fat and veins
70% of our sensory receptors ar associatd with what special sense organ?
the eyes
What is the function of the eyebrows?
Magnify facial expression and protect the eyes from water
What is the function of the eyelids?
to moisten and protect the eyes
What is the conjunctiva?
it is a transparent mucus membrane that covers the eye and inner eyelid
What is the lacrimal apparatus?
It consists of the lacrimal gland and associated ducts.
Where does the lac app drain?
the nasal cavity
What is the function of the Lac. APP?
Cleanses and lubes the eye surface
delivers O2 to the conjunctiva
What are the three cavities of the eye?
APV
Anterior Chamber-cornea and iris
Posterior Chamber-iris and lense
Vitreous Chamber-Lense and retina(contains vitreous humor)
What are the three layers of the eye?
Fibrous, Vascular(choroid), Retina
What is aqueous Humor?
Watery liquid that fills the anterior cavity of the eye
What is Vitreous Humor?
Jelly like substance that fills the vitreous chamber
What provides the eye with intraocular pressure? What is the use of IOP?
Vitreous Humor
Maintains the shape of the eye
What is the function of the eye lens?
Refracts light into the eye
What is the eye lens made of?
Compressed cells called lens fibers
they are filled with crystallin protein
Where does tension in the lense come from?
Suspensory ligaments
When the ciliary body contracts the suspensory ligaments ___ causing the lens to become ___
This is used for ___ vision
relax
thicker
Close
When the ciliary body relaxes the suspensory ligaments ___ causing the lens to become ___
This is used for ____ vision?
Contract
thinner
distant
The fibrous tunic of the eye is composed of two layers called the _____ and _____
opaque Sclera
clear Cornea
What is the function of the Sclera?
Protects the eye and achors extrinsic muscles
What is the function of the cornia?
it allows light to enter the eye
begins to focus the light on the retina
What is the shape of the cornia?
convex to refract light
What are the three portions of the Vascular tunic?
The choroid region
the ciliary body
the iris
What are the two muscle shapes that control the pupil?
circular and radial
When the circular muscles of the iris contract the pupil ____
becomes constricted
When the radial muscles of the iris contract the pupil becomes_____?
Dilated
The internal tunic of the eye is also called the?
Retina
What are the three neurons involved with visual perception.
Ganglion cells
bipolar neuron
photoreceptors
What are the two types of photo-receptors found in the eye?
rods and cones
What are the rods of the eyes responsible for?
Grey-scale vision.
They respond to dim light and detect movment
What are the cones of the eye responsible for?
Color vision
Each cone synapses with a single ganglion cells
The area of the highest cone density is called the?
Macula Densa
What causes the blind spot in they eye?
where the optic nerve leaves the eye
What 4 transparent media does light pass through before reaching photoreceptors.
The cornea
Aqueous humor
Lens
Vitreous humor
Where is the source of primary light refraction in the eye?
the cornea
What type of neurons are involved in olfaction
Bi-polar neurons
How many chemo receptors are on the tongue?
10,000
What are the three sections of the ear?
external, middle, internal
The visible part of the ear is called?
the auricle
The outer ear consists of ____ cartilage
elastic
What is the function of the Tympanic membrane
the ear drum
Vibrates in response to sound
passes the vibration to the ossicles
What is the middle ear?
an air filled chamber that contains the ossicles
connected to the nasopharynx
What features separate the middle ear from the inner ear?
the oval and round windows
What are the ossicles?
three small bones within the middle ear that carry vibrations from the tympanic membrane to the vestibule of the inner ear.
what is the function of the semi-circular canals
communicates moment along 3 axes
what is the function of hair cells?
take auditory stimulus and send to nervous system
Where is pitch perceived?
primary auditory cortex
cochlear nuclei
What causes tinnitus
Damage to hair cells cause them to continuously fire causing a high pitch ring
What are the two types of equilibrium?
Static and dynamic
What is static equilibrium?
Body position relative to gravity
What is dynamic equilibrium?
Body position in response to sudden movment
What are the semicircular ducts role in equilibrium?
Orient rotational movment
What are the saccule and utricles?
two liquid filled sacs within the vestibule.
What are the saccule and utricles role in equalibrium?
respond to linear acceleration
What is the macula?
a thick region in the walls of the saccule and itricle
What is the role of the macula?
it contains receptors for static and linear equilibrium
location of hair cells