Exam 1 Ch5,6,7 combined Flashcards
3 cranial fossae
anterior
middle
posterior
3 layers of meninges
- Dura
- Arachnoid
- Pia
Cerebrospinal fluid: Made by
by ependymal cells in the 2 lateral ventricles
CSF function
- mechanical protection (makes brain floating/absorb impact)
- Chemical protection (act as a buffer)
- nutrients waist transfer
CSF Volume
150 cc
CSF filtration rate
20 cc per Hour
3 spaces (meninges)
epidural
subdural
subarachnoid
_____ is a Common neurological symptom: benign, maybe bad
Headache
Brain has nociceptors (true/false)
false
Intracranial sensory nerves
V
IX
X
Headeach + neck stiffness + fever =
meningitis
Sudden explosive headache (worst headache ever) =
subarachnoid hemorrhage
Types of headaches
Vascular
Inflammatory
Tension type
Increased ICP
Fatigue
Traumatic
Toxic/metabolic
Infectious
Referred
Low pressure
Types of Vascular Headache
Migraine
Cluster
Dissection
Migraine is most common in (men/women)?
women
Type of migraine:
unilateral and throbbing, lasts a few hours, bright light and loud sound makes it worse, prodrome (aura)
Classic migraine
Type of migraine:
same as classic + other neuro finding (blinding in 1 eye, tingling, weakness)
Complicated migraine
Type of migraine:
doesn’t give a headache, causes nausea and other debilitating symptoms.
Atypical migraine
Type of a vascular headaches:
middle aged men, unilateral behind 1 eye, last minutes, short and intense, alcohol and stress make it worse
Cluster
Dissection (neurologic) causes damage to
the tunica intima
Dissection (neurologic) results in
thrombus or embolism formation at this site resulting in ischemia
Tension Type Headache aka
Cervicogenic/ subluxation
Tension Caused by
dehydration
stress
psychological
Tension Described as
squeezing (hatband)
Fatigue Headache is related to:
sleep deprivation
eye strain
Causes of Toxic/Metabolic Headachea
- dehydration (hangover)
- chemical exposure
- rebound (withdrawal ie: caffeine)
Cuases of Referred Headache
- dental
- eye strain
- sinus irritation (frontal or maxillary sinus)
- neck pain suboccipital
Inflammatory Headache (Temporal) aka
giant cell arteritis
Inflammatory Headache common in (who)
elderly patients
Inflammatory Headache risks
inflammation of temporal aa
ophthalmic aa
Inflammatory cells invade tunica ____
media
Fibrotic change results in the tunica _____
intima
Inflammatory Headache Signs and symptoms:
Swelling of the superficial temporal artery
Will be hard and palpable
Scalp pain
Causes of neurological deficits?
(Increased Intracranial Pressure)
- compression
- destruction
- herniation
Increased Intracranial Pressure-
Signs and symptoms (Cushing triad)
increase bp (pressure in skull)
decrease HR (due to the coratid receptor, dorsal nucleus of vagus)
irregular respiration
Increased Intracranial Pressure- Global symptoms
headache
changes in mental status
Increased Intracranial Pressure - Focal symptoms
specific to the area of brain preforming that function
Def: optic disc gets swollen and puffy (due to increased ICP)
Papilledema
Nervous System Herniation Locations:
- cingulate gyrus
- inferior media temporal lobe
- cerebellar tonsil
- new opening
Hydrocephalus happens due to
obstructed CSF flow
Hydrocephalus symptoms (adults)
increased ICP
Dementia
Urinary incontinence
Gait impairment
loss of forward and back ward stability
Hydrocephalus symptoms (children)
increased ICP
big head (skull is not fused)
setting sun sign (rolling down eye)
high pitch scream
poor head control (weight of water)
transillumination (shine a light on one side, and be visible on the other)
Intracranial tumors causes
- increased ICP
- Focal deficit (also global deficit)
Damage to the tunica intima leads to
blood flowing into the false lumen
Fibrotic change due to Inflammatory Headache leads to the closur of the ____
lumen
Intracranial tumors causes
- increased ICP
- Focal deficit (also global deficit
What do benign tumors do to the surrounding tissue?
push the tissue away
What do malignant tumors do to the surrounding tissue?
invade the surrounding tissue
is the benign tumor encapsulated?
if yes, what is the capsule made of?
Yes, with fiber/calcium
is the malignant tumor encapsulated?
if yes, what is the capsule made of?
No
benign tumor growth rate
slow
malignant tumor growth rate
fast
Benign tumor recurrence
less likely
Malignant tumor recurrence
more likely
Tumor types
mets (metastatic)
glioma
meningioma (benign)
pituitary tumor
Schwannoma
metastatic precentage of all tumors
23%
glioma precentage of all tumors
40%
what’s the ratio of benign to malignant glioma
1:1
meningioma precentage of all tumors
17%
is meningioma benign or malignant
benign
pituitary tumor percentage out of all tumors
5%
Schwannoma percentage out of all tumors
5%
Trauma injury sites
Linear impact coup
Rebound impact Contrecoup
Rotational Shear Damage
- Rotational component of injury affect the lower parts of brain
- Basal ganglia and thalamus
- Corpus callosum
the Cause of concussion
Mild head trauma
concussion symptoms
loss of consciousness
headache
vomiting
amnesia
disorientation
seizure
focal neurological deficit
fatigue
concussion Signs
oculomotor difficulties
vistibulo-ocular disturbance
balance and postural instability
Define:
Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT)
computerized baseline compared to post injury
ImPACT measures
- attention span
- working memory
- sustained and selective attention time
- response variability
- nonverbal problems solving
- reaction time
SCAT5 characteristic
- Sport concussion assessment tool
- Has immediate on field assessment
- Also has office assessment
On field assessment includes
- Red flags
- Observable neurologic signs
- Memory assessment
- Glasgow coma scale and cervical examination
Off Field assessment includes
- History of injury
- Symptoms scale
- Cognitive assessment
- Neurological and balance exam
- Delayed recall – short term memory
- Decision making – problem solving
Guidelines for Concussion Management
- removal from contest following signs and symptoms of concussion
- no return to play in current game
- medical evaluation following injury
- rule out more serious intracranial pathology
Step wise to return to play
- No activity rest until asymptomatic
- Light aerobic excersise
- Sport specific training
- Non-contract drills
- Full contract drills
- Game play
Generally about 24 hours per step
Post Concussive Syndrome can last
days to weeks after injury
Post Concussive Syndrome
sign & symptoms
- Fatigue
- difficulty concentrating
- irritability
- light sensitivity
- noise sensitivity
- emotional lability
- dizziness
- headache
- neck pain
- nausea
- vomiting
Contusion aka
Traumatic Intracerebral or Intraparenchymal Hemorrhage
Epidural Hematoma location
between dura mater and skull
Epidural Hematoma gets worse over the course of (time)
hours (rapidly)
Epidural Hematoma complications
- Rupture of middle meningeal artery
- Lens shaped convex hematoma
- Rapid progressing
- Displaces brain tissue
- Leads to herniation
Subdural hematoma complication
- rupture of bridging veins, slower in developing
- Shear force tear of bridging veins
- Crescent shaped bleed
Acute Subdural hematoma
within 24 hours severe neurologic deficits, 50% mortality
Subacute Subdural hematoma
1-14 days post injury with focal neurologic deficits
Chronic Subdural hematoma
2-6 weeks after injury
headache
balance problems
weakness
the worst type of hematoma
Subarachnoid hematoma
Subarachnoid hematoma complications
- Often from aneurysm
- Ticking time bomb
- Worst headache of my life
- Congenital aneurysms
- Blood fills subarachnoid space
- 40-50% mortality
Intracerebral hematoma caused by
high bp
diabetes
small vessels
Hypertensive hemorrhage
- High blood pressure threatens deep penetrating arteriols
- form micro aneurysms
- The micro aneurysms harden
- Continued pressure causes them to rupture
- Happens in basel ganglia pons cerebellum
Laceration
tearing of nervous system
Central Nervous System Infection can be caused by:
bacteria
viral
parasitic
prions
CNS infections Spread via
blood
the most common Symptoms with infections in the CSF
fever (bacterial & viral)
neck stiffness
headache
Bacterial meningitis may be fatal within _____
Hours of onset
the most fatal bacteria that cuause meningitis
Neisseria meningitis
Strep. pneumonia
Haemophilus influenzae
Bacterial meningitis signs and symptoms
- headache
- fever
- neck stiffness
- CSF cloudy full of puss
Def Brain abscess
pocket full of puss in the brain
Brain Abscess symptoms
headache
fever
neck stiffness
neurological signs specific to that area
Chances of survival with treatment (percentage)
80%
Lyme Disease is caused by
borelia burdoferri
Lyme Disease is transmitted by
deer tick
Lyme Disease stage 1 timing
Days to weeks after infection
Lyme Disease stage 1 symptoms
- Muscle + joint pain
- Swollen lymph nodes
- erythema migrans (thigh, groin, axilla)
Lyme Disease Stage 2 timing
Weeks to months
Lyme Disease Stage 2 symptoms
- Unilateral facial paralysis
- Mild meningitis
Lyme Disease Stage 3 timing
Months to years after untreated infection
Lyme Disease Stage 3 symptoms
- Chronic Lyme arthritis (MC knee)
- Nervous system problems: memory loss and difficulty concentrating
- chronic pain in muscles and unrestful sleep
describe lyme disease target rash
: pimple surrounded with a red ring
Viral meningitis aka
aseptic meningitis
what’s a special sign about viral meningitis
Clear CSF
Defince Encephalitis
viral infections that involve the brain parenchyma
is Encephalitis (more/less) severe than typical viral meningitis?
more severe
encephalitis results in
meningoencephalitis
exapmle of primary viral infection
west nile
west nile is transmitted by
mosquito
example of secondary viral infection
herpetic rash
Subacute sclerosing panencephalitis is caused by
persistent measles infection
Subacute sclerosing panencephalitis symptoms
- Intellectual deterioration
- Forgetfulness
- Hallucination
- Seizures
- Neurological signs through CNS
Subacute sclerosing panencephalitis prognosis
Variable prognosis (recovery to death)
Sleeping Sickness aka
African trypanosoma
Sleeping Sickness stage 1 symptoms
fever
joint pain
headache
Sleeping Sickness stage 2 symptoms
sleep/wake cycle disruption
confusion
ataxia
tremor
Cysticercosis is caused by
tenia solium
Cysticercosis symptoms
- Headache
- Nausea
- Vomiting
- seizure
what are prions?
protein fragments
Creutzfeldt-Jakob disease symptoms
rapid progressive dementia
ataxia
hallucination
startle response
myoclonus
Prions Incubation period
2-25 years
prions are tramitted from
from organ transplant
beef with BSE
prions prognosis
death within 6-12 months
prions infections are differentiated using
lumbar puncture
spinal tap
lumbar puncture is taken at which level?
L4/L5 (below the spinal cord)
Too much fluid drawn or too fast during the lumbar puncture is the cause of
low pressure headache
list the Corticospinal pathway
- Cerebral cortex
- Midbrain
- Pons
- Medulla
- Spinal cord
Corticospinal is Influenced by
cerebellum and basal ganglia
Corticobulbar Tract begins in
primary motor cortex
Corticobulbar Tract projects to
brain
how many lower motor neuron does the autonomic system have?
2
A 2 lower motor neuron pathway of the autonomic system are influenced by
- hypothalamus
- amygdala
- nucleus tractus solitarius
Autonomic Neuron #1 location
brain stem or cord