NEURO (TBI-Stroke-HA-Neurodegenerative) Flashcards
In TBI, approx how many deaths per year occur
52,000
Leading cause of death & disability in children/adults from 1-44 y/o
Traumatic brain injury
Who are more likely to experience TBI?
Males, twice as likely than females
Non-degenerative, non-congenital insult to brain from external mechanical force
TBI
Associated diminished or altered state of consciousness
TBI
TBI is possibly leading to permanent or temporary impairment of ______, _______, & ________ functions (CPP)
Cognitive, physical, & psychosocial
What are the types of TBI
- closed brain injury
- open brain injury
A type of TBI, without the skull being broken or penetrated & the brain not being exposed
Closed brain injury
Type of TBI: When the rapid movement of the head backward and forward (acceleration-deceleration movement) causes the brain to move inside the skull & slam against its hard inner bone.
Closed brain injury
What are the two closed head injury
- Coup injury
- Countercoup injury
Sudden hyperextension of the head & neck forces the brain forward against the front of the skull
Coup injury
Hyperflexion of the head & neck forces the brain backward against the skull
Countercoup injury
Combination of coup & countercoup injury
Whiplash
C1 & C2 damage (use of neckbrace)
Paraplegia
N/V
Dizziness
Headache,
V diplopia (severe),
H diplopia (mild)
Transient visual loss (Amaurosis fugax)
Concussion
Process where u can obtain bruise/blood clot
Contussion
If the contusion hasn’t caused infarction, how can we can stop temporary amnesia from becoming permanent?
- Warm compress: dilate BV to let blood flow
- Cold compress: ease throbbing/symptom
If there’s external force, don’t let px sleep for 3hrs to prevent infarction even w/o wc
Which part of the brain is affected with temporary/selective amnesia?
Any part of the brain
Which part of the brains affected in permanent amnesia?
Hippocampus
Open or penetrating head injury
Open brain injury
In Open brain injury, TBI can be ______ or _______, damage may be isolated to one specific area of brain in focal injuries or widespread in case of diffuse injuries
Focal or diffuse
Etiology of Open brain injury (FVVS)
- Falls
- Vehicle-related collisions
- Violence (gunshot wounds, child abuse, shaken baby syndrome)
- Sports injuries (soccer, boxing, football, extreme sports)
TBI is divided into
- Primary injury / brain damage
- Secondary injury / brain damage
Induced by mechanical force & occurs at the moment of injury
Primary injury
Not mechanically induced, may be delayed from moment of impact & may superimpose injury on a brain already affected by mechanical injury
Secondary injury
Cause subdural hemorrhage, drown the brainstem & lead to loss of voluntary response
Secondary injury
Secondary injury cause __________, drown the brainstem & lead to loss of voluntary response
Subdural hemorrhage
What part of brain is affected if there is a problem in posture/walking
Cerebellum (drowning)
What are the two main mechanisms of Primary brain damage
- Contact
- Acceleration-deceleration
Mechanism of primary brain damage which result in fracture to the skull & surface contusions
Contact
Mechanism of primary brain damage which results in unrestricted movement of the head & leads to shear, tensile, & comprehensive strains
Acceleration-deceleration
Primary brain damage: These forces can cause _________,__________,________
Intracranial hematoma, diffuse vascular injury, & injury to cranial nerves & pituitary stalk
The most common cause of death & clinical deterioration after TBI
Intracranial Hematoma
What are the three categories of hematomas (ESS)
- Epidural hematomas
- Subdural hematomas
- Subarachnoid hematomas
Hematoma: caused by fracture of temporal bone & rupture of middle meningeal artery
Epidural hematoma
Hematoma: such hematomas are usually caused by rupture of the bridging veins in the subdural space
Subdural hematomas
Hematoma: these result from damage to blood vessels in the posterior fossa stalk
Subarachnoid hematomas
Extracranial hematoma (SIN)
- Scalp lacerations
- Nasal injuries
- Injuries to face & neck can lead to significant blood loss
Occurs hours, days after traumatic event.
Injury may result from impairment in cerebral blood flow after TBI
Secondary brain damage
Decrease in cerebral blood flow (CBF) are results of _______,________, or __________
Local edema, hemorrhage, or increased intracranial pressure (ICP)
As a result of inadequate perfusion, cellular ion pumps may fail, causing a cascade involving intracellular calcium & sodium
Secondary brain damage
____________ may contribute to cellular destruction
Resultant calcium & sodium overload
Excessive release of excitatory amino acids, such as ________&________ exacerbates failure of ion pumps
Glutamate & aspartate
As the cascade continues, cells die causing ______,______&__________
Free radical formation, proteolysis, & lipid peroxidation
In secondary brain damage all the factors ultimately cause
Neuronal death
Extracranial causes of SBD (FF)
-failure of adequate cerebral perfusion from circulatory shock
-failure of cerebral oxygenation from disturbance of pulmonary ventilation from: (aspiration, instability of chest wall (flail chest), neurogenic disturbances of ventilatory drive)
Intracranial causes of SBD (RC)
-rise in ICP due to mass lesions & cerebral edema leading to fall in cerebral perfusion pressure & to herniation of brain is a major factor in poor outcome
-cerebral autoregulation impraired
Signs & symptoms of Mild TBI (LMH-DND)
- loss of consciousness for a few seconds
- memory/concentration problems
- headache
- dizziness/loss of balance
- N/V
- difficulty sleeping
Signs & symptoms of moderate to severe TBI (LIPS-LW)
- loss of consciousness several mins to hours
- slurred speech
- inability to awaken from sleep
- weakness in fingers & toes
- loss of coordination
- persistent headache/ headache that worsens
Children symptoms of TBI (CCCPS)
- change in eating/nursing habits
- persistent crying & inability to be consoled
- change in ability to pay attention
- change in sleeping habits
- sad/depressed mood
Presentation: Cognitive problems (JAMS-LPD)
-Memory
-Learning
-Problem solving
-Speed of mental processing
-Judgement
-Attention or concentration
-Decision making
Presentation: Physical changes (SSCC-PL)
-Spasticity
-Physical paralysis
-Chronic pain
-Sensory
-Loss of stamina
-Control of bowel & blader
5th leading cause of death in US, one person dying every 4 mins
Stroke
Second leading cause of death in the world
Stroke
Approx ________ people have a stroke each year, one every 40 secs
800,000
Occur due to problems with blood supply to the brain; either the blood supply is blocked or a blood vessel within the brain ruptures, causing brain tissue to die
Stroke
Clinical syndrome of rapid onset of cerebral deficit lasting more than 24hrs or leading to death with no apparent cause other than a vascular one
Stroke
Rapid loss of brain function due to disturbance in the blood supply the brain
Stroke
A stroke happens when blood flow to a part of the brain stops and is sometimes called
Brain attack
Most common cause of severe physical disability
Stoke
Prevalence of stroke in India:
Death rate:
PrevalenceL 1.54 per 1000
Death rate: 0.6 per 1000
Types of stroke (HIT)
-Ischemic stroke
-Hemorrhagic stroke
-Transient Ischemic Attack (TIA)
Most common form of stroke, 85% of strokes
Ischemic stroke
Type of stroke caused by blockage or narrowing of arteries that provide blood to the brain resulting in severely reduced blood flow
Ischemic stroke
Ischemic stroke: blockages are often caused by _________
blood clots
Clots can be caused by fatty deposits within the arteries called
Plaque
Type of stroke: Caused by arteries in the brain either leaking or bursting open
Hemorrhagic stroke
Hemorrhagic stroke: ruptures can be caused by conditions such as (BATH)
-Hypertension
-Trauma
-Blood thinning medications
-Aneurysms (weakness in blood vessel walls)
What are the two types of hemorrhagic stroke
-Intracerebral hemorrhage
-Subarachnoid hemorrhage
Most common type of hemorrhagic stroke, occurs when brain tissue is flooded with blood after an artery in the brain bursts
Intra cerebral hemorrhage
Second type of hemorrhagic stroek, less common, bleeding occurs in subarachnoid space - area between brain & the thin tissues that cover it
Subarachnoid hemorhage
flow of blood to the brain is only briefly interrupted
Transient Ischemic Attack (TIA)
How is TIA similar to Ischemic stroke
they are often caused by blood clots or other debris
should be regarded as medical emergencies
TIA
referred to as “mini strokes”, lasts below 24 hours
TIA
serve as warning signs for future strokes & indicate that there is partially blocked artery or clot source in the heart
TIA
Between ______% will have major stroke within 3 months of TIA
10-15%
due to vasoconstriction induced by stress
TIA
Causes of TIA (LUCS)
- Large artery atherosclerosis
- Cardio-aortic embolism
- Small artery occlusion
- Undetermined cases:
unknown - cryptogenic embolism
unknown - other cryptogenic
unknown - incomplete evaluation
Signs of TIA (WTV-HD)
- Weakness (sudden loss of strength/numbness in face, arm, leg)
- Trouble speaking (sudden difficulty speaking/understanding, confusion)
- Vision problems (sudden trouble w vision (amaurosis fugax)
- Headache (sudden severe & unusual headache)
- Dizziness (sudden loss of balance, w any of the above signs)
Symptoms of TIA (CHNTT)
- Confusion (incl; trouble speaking & understanding)
- Headache (w altered consciousness or vomiting)
- Numbness of face, arm/leg on one side of body
- Trouble seeing in one or both eyes
- Trouble walking, including dizziness & lack of coordination