W5/W6 Neurological System and Head/Neck Flashcards
Describe 2 divisions of the nervous system
- Central Nervous System: Brain, cerebrum, cerebellum, brain stem ( pons , mid brain, medulla) Spinal cord
- Peripheral system: Cranial nerves (12) and spinal nerves (31 pairs)
- Somatic Voluntary: motor and sensory
- Autonomic nervous system: Sympatheic (fight) or parasympatheic systems
Cerebrum
- Higher brain functions , governing memory, thoughts, descion making, voluntary movements
- Two hemispheres and 4 lobes
1. Thalmus: center for sensory info and motor
2. Hypothalmus: regulaes vital functions such as BP, HR, appetie , hormones
Right/Left side of brain
- controls mainly speech, analytical side, control right motor and sensory information.
- Right side is more creative, controling ; left motor and sensory information.
Brain stem
Composed of midbrain, medulla ( autonomic respiration, cardiac, GI tract)
- has ret. system which increases wakefulnness, attention, responsive
- Midbrain, medulla, pons
Cerebellum functions
- ## Posture, coordination and balance
Language Centers
1) Wernickes area: temporal lobe associated with langauge comprehension ( aphasia results in the inability to understand language)
2) Brocas area: frontal lobe controls speech motpr, damage causes trouble producing the motor sound.
Spinal Cord
Continue from brainstem connecting brain to spinal nerves. Composed of sensory pathways ( travel through spinothalmaic tract or dorsal posterior columns) Also composed of motor pathways ( travel through cortiospinal , extrapyramidal, and cellular systems)
Ascending Spinal Cord Tract
Sensation travels in the afferent ( sensory) fibers in peripheral nerves through the posterior dorsal root then into spinal cord. Within spinal cord , may take one of 2 ways: Spinothalmaic tract or Posterior columns. Ascen. carries sensory info from peripheral to higher CNS.
1. Spinothalmaic: fibers transmit sensations of pain, touch, temperature, connects to thalmus center.
2. Posterior columns: conducts sensations of position (proprioreception) , vibration, fine touch (stereognosis)
Descending tract spinal cord
Carries infomration related to motor functions and muscle movement from motor cortext to spinal nerves controlling movements Takes three ways:
Corticospinal tract: vol. movemenst, very skilled discrete purposeful movements like writing.
Extrapyramidial tracts: maintain muscle tone, control movements, gross movements like walking
Cerbellar System: coorindates posture, balance, equilibrium.
Peripheral System
Composed of cranial nerves, spinal nerves, autonomic nervous system.
Peripheral nerves carry input to CNS via sensory afferent fibers and exists via efferent motor.
Cranial Nerves
Enter and exit the brain rather than spinal.
12 pairs of CN supply head and neck.
CN I Olfactor: Sensory nerve for smell
CN II Optic: Sensory for sight
CN III Oculomotor: Mixed for motor eye movement as well as pupil control.
CN IV Trochelar: Motor nerve for downward and inward eye movement
CN V Trigeminal: mixed nerve that controls muscles for masitfcation and sensory for face sensation
CN VI Abducens ( motor of eye)
CN VII Facial ( mixed facial muscles and taste senses)
CN VIII Acoustic ( sensory , hearing)
CN IX Glosspharyngeal ( mixed, pharynx motor and taste senses)
CN X Vagus ( motor ppharynx, larynx
CN XI Spinal ( motor)
CN XII Hypoglossal ( tongue motor)
Spinal Nerves
31 Pairs
- Arises from the spinal cord nd supplies rest of the body
- Described by their location in relation to veterbare
- 8 cerical, 12 thoraic , 12 Lumbar, 5 sacrcal, 1 coccynx
- The pairs innervates on right/left sides dermatomes
Autonomic nervous system
- Sympatheic ( epinphrine and adrenalin)
During times of stress and fight/flight - Parasympathetic ( acetycholine)
Relax and rest
Work together to aid in involuntary functions and contractions.
Neurological Assessment
Using a systemic approach
Objective data collection: Starting with general survey + vitals
1. General Survey and Vital Signs ( physical apperance, body structure, behavior, mobility)
2. Inspection Paptation Percussion Asuctation Physcial examination Validate their subjective answers
Subjective data collection:
Pain assessment, health history quetions, open ended and focused ( change in behavior, dizzyness, medications, past ilness)
Muscuoskeletal and Neurogenic assessment
–> Start with inspection and palptation
–> Inspect body structure ( posture, gait, movements) , physical apperance ( skin, facial expressions, symmetry)
Do in depth assessments when abornomal findings
What subjective data is gathered ?
Questionsare asked regarding the following topics:
- Health medical history including diagnoses and pas injuries like stroke, head trama
- Screening tests BP
- Family healt history
- Medications taken
- Allergies
- Any changes in behavior, dizzyness, emotions
- Risk for neurological illnesses ( obesiity, stress)
- Imunizations-> helmet, alochol?
- Smoke? Enviornmental exposures?
Focused health history questions:
–> Headache, dizzyness , tremors, seziure, weakness, incoorindation, balance, gait probelms, involuntary movements, syncope ( fainting), veritgo
–> Numbness, dysphagia, changes in senses, vison, speech , memory, attention, mood,
Conduct a OPQRSTUV full assessment on the pain
Assessing for level of consciosuness
Alert: awake, fully aware of enviornment and responds well and appropriate
Orientated: to person, place, time, event ( AxOx4)
Enter-> voice-> louder-> touch lighter than deeper-> pain)
If the client is not fully alert: call namer, light touch, pain applied
AxO 1 Alert to person AxO 2 Alert to person place AxO 3 Alert to person, place, time AxO 4 person, place, time, event
What is the glascow coma scale?
- GCS is an objective method of recording ones conscious state and divides brain functioning into three areas: Defines the level of consciosuness through giving a numerical value. Three areas respond: Pt assessed against criteria of scale, results in points giving a pt score between 3 ( deep unconsciosuness) and 15
- Eye opening: /4 spontaneous, to speech, to pain, no response
- ** verbal responses: /5 Orientated x3, confused, inappropiate words, incompherensive, none
- motor responses: **/6 Obeys, localizes painful stimulus, flexion, extension, no response
What are the cognititive functions assessed?
- Level of Consciousness ( Alert and oritentation x4)
- Communication
- Attention
- Memory
- Vocabulary
- Calculation
- Descion making
- Learning ability during health education
- tested during interactions
The assesment of cognitive functions, is intergrated with history taking, planning goals care. Ensures pt intelligence not challeneged.
Assessing oritentation
- Vary questions , AxOx4
Assess mental status
MMSE and MocA
- Geriaric Depression Scale
Geriatric Depression Scale
- Depression not normal sign aging
- May be reversible, results in long term impairments affecting life
- Less than 5 pt results in follow up assessment
Objective Neurological Assessment
-> Preparation ( screening neuro assessment)
- Neurological exam complete and rechecking too
-> Equiptment: penlight, cotton, tongue blade, sharp/dull obejcts
Neuro assessment will begin with vital signs and general survey