Neurology - Part 1 Flashcards
Somatosensory Pathway
Spinal Cord to Brain (Afferent)
Motor Pathway
Brain to Spinal Cord (Efferent)
Subgroups of Neuromuscular Conditions
- Non-progressive disorders of the CNS: Congenital or acquired in infancy/childhood (Autism, Epilepsy, Spina Bifida, Down’s Syndrome, Meningitis, Cerbral Palsy
- Non-progressive disorder of CNS: Acquired in adolescence or adulthood (TBI, meningitis, CVA, concussion, asphyxia
- Progressive disorders of the CNS (Alzheimer’s disease, MS, ALS, Parkinson’s)
- Spinal Cord Injury (Trauma or Tumor)
- Peripheral Cord Injury (Brachial plexus lesion, CTS, Tarsal Tunnel Syndrome)
- Acute or Chronic Polyneuropathies (Diabetes, alcoholism, Guillain-Barre Syndrome)
- Coma or near coma state
Who do you observe?
Providers, patients, etc.
What will you look for?
- Having symptoms they haven’t told you or think they should tell you
- How they respond to the conversation
- Attitude
How do conversations contribute to clinical decision making?
Guide Priority List
What is cruical for pediatric observation?
How children interact with the environment
Who do you prioritize a global observation for?
EVERY PATIENT
Dysarthria
Speech difficulties from impaired motor control
- Injury to tongue, palate, lips or pharaynx
- Lesion of motor nerve PNS or CNS
- Disease process of CNS
Dysarthria
Speech difficulties from impaired motor control
- Injury to tongue, palate, lips or pharaynx
- Lesion of motor nerve PNS or CNS
- Disease process of CNS
Dysphonia
Difficulties in voice production volume, pitch, quality
- May be due to inflammation or tumor or larynx
- Vagus nerve damage to larynx
Dysphagia
Difficulties with swallowing
Aphasia
Cognitive, nerological disorder that results in diffculty or inability to produce or understand language
Receptive aphasia
Difficulty understanding
Expressive aphasia
Difficulty talking/expressing
Global aphasia
Both receptive and expressive
How can you test the ability to participate and react?
- Understanding of questions
- Word Comprehsnsion (one step command)
- Repetition
- Naming
- Writing
Communication Assessment
Priority
- If diagnosis is known to cause communicarion problems
- Patient has diffuculty answering interview
What is cognition?
Conscious awareness of brain activity
-Includes attention, speed of processing, working memory, learning, adaptibility, problem solving
What is alertness?
State of active attention
Indluences by illness, medications, fatigue, emotions
Decordicate rigidity
Arms to core
Decerebrate rigidity
Arms back
Working memory
immediate recall and processing
Short-term memory
Recent
Long-term memory
Stored memories
Anterograde amnesia
Difficulty recalling events that occur after the trauma
Retrograde amnesia
Loss of memories from before the trauma
Cognition Assessment
Priority
- Diasnosis is known cause of communication problems
- Patient has difficulty answering interview questions
What if your patient has a psychological disorder?
-Normalize
-Address symptoms that may influence care
-Refer to the appropriate provider
-Provide resources available
What if your patient has a psychological disorder?
-Normalize
-Address symptoms that may influence care
-Refer to the appropriate provider
-Provide resources available
Emotional and Psychological Factors
Priority
-Informal assessment begins at interview/observation
-Variable to the degree it will interfere
-Chronic Pain
-Life altering conditions
-Depression screening questions
What does the doral root carry?
Sensory Fibers
What does the ventral root carry?
Motor Fibers
What is distal to spinal nerve roots?
Branches -> Cords -> Divisions -> Trunks -> Roots
Somatosensory Assessment
Priority
- Symptoms of nervous system involvement
- Those at risk for a condition that impairs distal extremity sensation
- Suspected nerve root level
Upper Motor Neurons (UMN)
- Affects spinal cord or brain
- Traumatic or disease process
- Common conditions: TBI, Stroke, SCI, MS
Lower Motor Neurons (LMN)
- Involves peripheral nerves
- Traumatic nerve or disease process
- Common conditons: Disc Bulge, Sciatica
Spinal Nerve Root Testing
Priority
-Use when symptoms suggest nerve root pathology
-Differential between nerve root and peripheral nerve
What is a reflex?
- An action that is performed as a response to a stimulus and without conscious thought
- Protects from harm
Deep Tendon Reflexes (DTR)
Afferent nerve has direct connection with muscles spindle in target muscle
Quick stretch tendon (stretch reflex) stimulates muscle spindle
No specific DTR for each spinal level
How are DTRs assessed?
Grading
0 = No reflex
1+ = minimal or depressed response
2+ normal response
3+ overly brisk response
4+ brisk response with clonus
(IF 1+ and 3+ are bilateral may not indicate pathology)
Hypotonic DTRs
- Injury or compression along the nerve pathway, including the nerve root
- Prohibits transfer of the reflex message, either incoming or outgoing
- If interruption of pathway, DTR will be diminished
- If only one nerve root is involved, DTR might be present but diminished
Hypertopic DTRs
- CNS pathology
- DTRs are influences by the descending motor pathways
- Corticospinal tract messages tend to inhibit the synaptix response
- Any point superior to the tract may inhibit modulation
When should you perform a Deep Tendon Reflex Assessment?
Symptoms of CNS or PNS dysfunction
Suspected disease of CNS
What is required for coordinated, volitional movement?
Adequate joint ROM
Strength
Intact neural pathway
Adequate cognitive processing to carry out the motion
Role of Cerebellum
Movement synergies – does not cause movement but influences quality
Maintenance of upright posture
Maintenance of muscle tone
Receives sensory input from spinal cord and brain
Types of Cerebellar Dysfunction
- Ataxia
- Dysdiadocokinesia
- Intention Tremor
- Postural Tremor
- Hypotonia
- Dysarthria
- Deviations in eye control
Ataxia
Without coordination; lack smooth trajectory and fine motor
Ex: Not normal heel to toe; odd rocking of foot
Dysdiadochokinesia
Inability to produce rapid alternating movement
Intention Tremor
Tremor increases as the limb reaches the target
Postural Tremor
Induced by intentionally maintained head or trunk posture or holding a limb in front of body
Hypotonia
Overall decrease in resting muscle tone
Dysarthria
Poor word formation because inability to coordinate muscles and structures of speech
Deviations in eye control
Lack of smooth pursuit, saccades, delayed initiation of eye movement
Coordination Testing - Priority
Known or suspected lesions in CNS that may affect cerebellar function
Observed uncoordinated movement or gait abnormalities
Difficulty manipulating small objects
Upper Motor Neuron Conditions: POTENTIAL FINDINGS
- Cognitive Deficits
- Weakness
- Balance Deficits
- Coordination Deficits
- “Global” Somatosensory deficits (spinothalamic and/or posterior columns)
- CN Involvement
- Hypo or Hypotonia (spasticity)
- Hyperreflexia
- +UMN testing
- Clonus
- Babinski and/or Hoffman
Lower Motor Neuron Conditions: POTENTIAL FINDINGS
- Pain and/or numbness and tingling along nerve distribution
- Weakness
- Hypotonia
- Pattern “Somatosensory deficits” (along peripheral N or dermatome)
- Hyporeflexia
- Negative UMN testing