LB 4-13 Flashcards
What are the four major regions of the brain
the cerebrum, diencephalon, brainstem, and cerebellum
Five lobes of the brain
Frontal lobe, Parietal lobe, Occipital lobe, Temporal lobe, Insula
Acute brain damage that occurs as a result of an accident or trauma
traumatic brain injury
The most common type of TBI. It is characterized by temporary, abrupt loss of consciousness after a blow to the head or the sudden stop of a moving head. Headache, drowsiness, lack of concentration, confusion, and amnesia (memory loss) may occur
concussion
A TBI where there is bruising of the brain due to trauma that causes blood to leak from small vessels into the subarachnoid space (a fluid-filled space surrounding the brain)
Contusion
Where an individual experiences a second brain injury prior to the resolution of the first injury, and develops severe brain swelling and possible death as a result
Second Impact Syndrome
What are the primary brain vesicles
prosencephalon, mesencephalon, rhombencephalon
Vesicle name for the forebrain
prosencephalon
Vesicle name for the midbrain
mesencephalon
Vesicle name for the hindbrain
rhombencephalon
What are secondary brain vesicles
telencephalon, diencephalon, mesencephalon, metencephalon, myelencephalon
The telencephalon arises from the _________ and eventually forms the ________
prosencephalon, cerebrum
The diencephalon also derives from the _____, and it eventually forms the ________
prosencephalon; thalamus, hypothalamus, and epithalamus
The mesencephalon is the only primary vesicle that (does/does not) form a new secondary vesicle. It becomes the__________.
does not, midbrain
The metencephalon arises from the _______ and eventually forms the ________
rhombencephalon, pons and cerebellum
The myelencephalon also derives from the ________, and it eventually forms the________
rhombencephalon, medulla oblongata
Folds of brain tissue
gyri
Shallow depressions between the gyri
sulci
What is the function of CSF
buoyancy, protection, environmental stability
This barrier strictly regulates which substances can and cannot enter the interstitial fluid of the brain to help prevent exposure of neurons in the brain to drugs, waste products in the blood, and variations in levels of normal substances (e.g., ions, hormones) that could adversely affect brain function
blood brain barrier
A hemorrhage that occurs in the subdural space between the dura mater and arachnoid mater
subdural hematoma
An inflammation of the meningeal coverings around the brain
meningitis
The meningeal layer of the dura mater extends as flat partitions into the cranial cavity at four locations. Collectively, these double layers of dura mater are called
cranial dural septa
The largest of the four dural septa. This large, sickle-shaped vertical fold of dura mater is located in the midsagittal plane and projects into the longitudinal fissure between the left and right cerebral hemispheres. Anteriorly, its inferior portion attaches to the crista galli of the ethmoid bone; posteriorly, its inferior portion attaches to the internal occipital crest
falx cerebri
A horizontally oriented fold of dura mater that separates both the occipital and temporal lobes of the cerebrum from the cerebellum
tentorium cerebelli
Extending into the midsagittal line inferior to the tentorium cerebelli is the_______, a sickle-shaped vertical partition that divides the left and right cerebellar hemispheres
falx cerebelli
The smallest of the dural septa. It forms a “roof” over the sella turcica of the sphenoid bone. A small opening within it allows for the passage of a thin stalk, called the infundibulum, that attaches the pituitary gland to the base of the hypothalamus
diaphragma sellae
Cavities or expansions within the brain that are derived from the neural canal, lined with ependymal cells and contain cerebrospinal fluid, connected with one another as well as with the central canal of the spinal cord
brain ventricles
Name the four ventricles of the brain
two lateral ventricles in the cerebrum, third ventricle within the diencephalon, fourth ventricle between the pons, medulla oblongata, and cerebellum
Thin medial partition separating the two lateral ventricles in the cerebrum
septum pellucidum?
The opening connecting the two lateral ventricles in the cerebrum with the third ventricle in the diencephalon
interventricular foramen
The narrow canal that passes through the midbrain and connects the third ventricle with the sickle-shaped fourth ventricle
cerebral aqueduct
What forms CSF
ependymal cells in the choroid plexus in the brain
How does CSF circulate
through the ventricles into the subarachnoid space
Pathologic condition of excessive CSF
hydrocephalus
Part of the brain sandwiched between the inferior regions of the cerebral hemispheres, referred to as the “in-between brain,” provides the relay centers for some sensory and motor pathways, and for control of visceral activities
diencephalon
Components of diencephalon
epithalamus, the thalamus, and the hypothalamus
Connects the cerebrum, diencephalon, and cerebellum to the spinal cord
brainstem
Three regions that form the brainstem from superior to inferior
midbrain, pons, medulla oblongata
Four major regions of the brain
cerebrum, diencephalon, brainstem, cerebellum
Raised folds of the outer surface of the brain
gyri
Shallow depressions on the surface of the brain
sulci
Deeper grooves on the surface of the brain
fissures
Acute brain damage occurring as a result of trauma
traumatic brain injury
Most common type of TBI, has cumulative effect of each successive _______, temporary loss of consciousness after blow to the heads, headache, confusion, loss of memory, drowsiness possible
concussion
Bruising to the brain usually associated with concussion
contusion
Individual with second injury prior to resolution of the first trauma
second impact syndrome
Botox does what in the nerves
stops acetylcholine from being released into the synaptic knob
At about 8-10 weeks, this first structure of the fetus begins to develop that is different than the other structures around it that becomes the nervous system
neural tube
Three primary brain vesicles
Prosencephalon, Mesencephalon, Rhombencephalon
Term for the primary brain vesicle, forebrain
prosencephalon
Term for the primary brain vesicle, midbrain
mesencephalon
Term for the primary brain vesicle, hindbrain
rhombencephalon
Vitamin required for the development of the neural tube in fetuses
folic acid
Deficiency in folic acid may result in what birth defect
spina bifida
Prosencephalon develops into what two secondary brain vesicles
Telencephalon, Diencephalon
Mesencephalon develops into what secondary brain vesicle
Mesencephalon
Rhombencephalon develops into what secondary brain vesicles
Metencephalon, Myelencephalon
Telencephalon develops into what adult brain structure
cerebrum
Diencephalon develops into what adult brain structure
diencephalon composed of epithalamus, thalamus, hypothalamus
Mesencephalon develops into what adult brain structure
midbrain (brainstem)
Metencephalon develops into what two adult brain structures
Pons (brainstem) and cerebellum
Myelencephalon develops into what adult brain structure
Medulla oblongata (brainstem)
Adult brain structure cerebrum and diencephalon develops from what primary brain vesicle
proencephalon
Adult brain structure midbrain and diencephalon develops from what primary brain vesicle
mesencephalon
Adult brain structure pons, cerebellum, and medulla oblongata develops from what primary brain vesicle
rhombencephalon
Adult brain structure that does consciousness, voluntary motor, thinking, higher order functions
cerebrum
Adult brain structure that does sleep/wake cycles
epithalamus
Adult brain structure that does relay center, filters information
thamalus
Adult brain structure that does master control of endocrine function and homeostasis
hypothalamus
Adult brain structure that does Visual and auditory reflexes
(brainstem) Midbrain
Adult brain structure that does Tuning basic staying alive functions, eg tuning heart rate and blood pressure
(brainstem) Pons
Adult brain structure that does Fine motor skills, balance & equilibrium, personality
Cerebellum
Adult brain structure that does Setting basic staying alive functions, breathing, heartbeat, blood pressure
(brainstem) Medulla oblongata
Gray matter in the brain is gray because of what
high concentration of neuron cell bodies which are gray
White matter is white because why
high concentration of myelinated axons which are white
Lobe that forms anterior part of the cerebral hemisphere, voluntary motor, planning, personality, decision-making, speech
frontal lobe
Information bridge between the left and right hemispheres
corpus collosum
Mnemonic for 12 cranial nerves
Oh Oh Oh To Touch And Feel Very Green Vegetables Ah Heavenly
Mnemonic LR6, SO4, AO3 for eye muscle
lateral rectus 6, superior oblique 4, all others 3
List 12 cranial nerves
Olfactory, Optic, Oculomotor, Trochlear, Trigeminal, Abducens, Facial, Vestibulocochlear, Glossopharyngeal, Vagus, Accessory, Hypoglossal
Function (S,M,B) of Olfactory nerve
S, Smell
Function (S,M,B) of Optic nerve
S, Vision
Function (S,M,B) of Oculomotor nerve
M, most eye movement
Function (S,M,B) of Trochlear nerve
M, superior oblique MM
Function (S,M,B) of Trigeminal nerve
S, sensory from face. M, MM for mastication
Function (S,M,B) of Abducens nerve
M, lateral rectus MM
Function (S,M,B) of Facial nerve
S, taste ant. 2/3 of tongue. M, MM of facial expression
Function (S,M,B) of Vestibulocochlear nerve
S, hearing and equilibrium
Function (S,M,B) of Glossopharyngeal nerve
S, taste post. 1/3 of tongue. M, MM of facial expression
Function (S,M,B) of Vagus nerve
S, most visceral sensory. M, 75-90% of autonomic motor
Function (S,M,B) of Accessory nerve
M, MM of neck
Function (S,M,B) of Hypoglossal nerve
M, MM of tongue
Cranial meninges from deep to superficial
pia mater, arachnoid mater, dura mater
Deep, delicate meninx of the brain, wraps directly to the surface of the brain
pia mater
Middle layer of meninges, creates spaces for the CSF in the brain
arachnoid mater
Most superficial, toughest layer of the meninges of the brain
dura mater
Inflammation of the meninges, headache, fever, neck pain
meningitis
Created by the dura mater, double layers of dura mater, extend as flat partitions into the cranial cavity
Dural septa
Four locations of dural septa
Falx cerebri, Tentorium cerebelli, Falx cerebelli, Diaphragma sellae
Sickle-like fold of the dural septa that extends into the longitudinal fissure of the left and right hemispheres of the brain
Falx cerebri
An extension of the dura mater that separates the cerebellum from the inferior portion of the occipital lobes
Tentorium cerebelli
Small sickle shaped fold of dura mater, projecting forwards into the posterior cerebellar notch as well as projecting into the vallecula of the cerebellum between the two cerebellar hemispheres
Falx cerebelli
Extension of the dura mater that sits over the sella turcica and protects the pituitary gland
Diaphragma sellae
Cavities within the brain
ventricles
Communication conduit between the third and fourth ventricle
Cerebral aqueduct
Fluid important for buoyancy, protection, and environmental stability
cerebrospinal fluid
Property of CSF that makes brain float, reduces apparent weight by 95%, prevents collapse of brain through foramen magnum
buoyancy
Property of CSF that provides liquid cushion, protects delicate structures from sudden movement protection
protection
Property of CSF that describes removal of waste products
environmental stability
Cluster of ependymal cells and blood vessels that create CSF
choroid plexus
Type of cell that circulates CSF
ependymal cells
Pathologic condition of excessive CSF, leads to brain distortion, headaches, neurological issues, can be treated surgically with implanted shunt
hydrocephalus
Condition of lack of development of an upper brain, cerebrum is not formed in fetus
Anencephaly
Cells that create the blood-brain barrier
astrocytes
Barrier between the brain and the blood, stop certain things from crossing over
blood brain barrier
Types of compounds that can cross blood-brain barrier
lipid-soluble compounds eg alcohol, nicotine, etc