Neuro Flashcards
2 Nervous System
Central and Peripheral Nervous System
CNS is about
Brain and Spinal Cord
2 Types of PNS
Somatic and Autonomic Nervous System
Voluntary Movements
Somatic Nervous System
2 Types of Autonomic Nervous System
Sympathetic
Parasympathetic
Basic functional unit of The Nervous System
NEURONS
Extension that carry the impulses toward the cell body.
Dendrite
Transmits impulses away from the cell body
Axon
Allows impulse to transmit
Myelin Sheath
Types of Neurons
Sensory Neurons (Affarent)
Motor Neurons (Efferent)
Interneurons
Transports impulse from receptors to the CNS
Sensory Neurons
Transports impulse from CNS to the receptors
Motor Neurons
Found entirely within the central nervous system
Specialized to transmit sensory / motor impulse
Interneurons
Communicate message from one neuron to another or from a neuron to a specific target tissue
Neurotransmitters
Excitatory
Control movements, motivation, and cognition
Regulates emotion response
DOPAMINE
Excitatory
Causes sympathetic stimulation
Causes changes in attention and learning
NOREPINEPHRINE
Excitatory
Control fight or flight response
EPINEPHRINE
Inhibitory
Controls emotion (happy and sad)
SEROTONIN
Inhibitory / Excitatory
Signals muscles to be alert
Controls wakefulness and sleep cycle
ACETYLCHOLINE
Inhibitory
Relaxation hormone
GABA
Excitatory
Responsible for relaying messages between MOTOR neurons
GLUTAMATE
CENTRAL NERVOUS SYSTEM
CEREBRUM
CEREBELLUM
BRAIN STEM
DIENCEPHALON
Cerebrum Lobes
Frontal
Parietal
Temporal
Occipital
Personality
Attention / Focus
Speech: Brocha’s Area (Expressive)
Thinking / Judgment
Frontal Lobe
Touch
Taste
Temperature
Parietal Lobe
Memory of sound
Hearing and Smelling
Speech: Wernicke’s Area (Receptive)
Temporal Lobe
Vision
Memory
Occipital Lobe
Balance and Coordination
Cerebellum
Brain Stem
Mid Brain
Pons
Medulla Oblongata
Auditory and Visual REFLEX
MId Brain
Pattern of Breathing
Pons
Controls heart and respiratory rate, coughing and vomiting
Medulla Oblongata
Diencephalon
Hypothalamus
Thalamus
Controls BP and Temperature
Hormone release
Hypothalamus
Pain threshold
Capable of suppressing minor sensation
Thalamus
Peripheral Nervous System
Cranial Nerves
CN
Sense of Smell
Sensory
Assessment: With eyes closed, patient is asked to identify familiar odors (Coffee, Cinnamon)
Abnormal: Anosmia – Loss of sense of smell
I - OLFACTORY
CN
Sense of Sight / Vision
Sensory
Assessment: Snellen’s Chart (Normal: 20/20)
Abnormal: Hemianopia, Blindness
II - OPTIC
CN
Pupillary constriction & dilation
Motor
Assessment: PERRLA
Abnormal: (-) PERRLA
III – OCULOMOTOR
CN
6 Cardinal Gaze movement
Motor
Assessment: Cardinal Field of Gaze Assessment
Abnormal: Nystagmus
IV - TROCHLEAR
CN
TriCHEWminal – For chewing
Facial SENSATION
Both
Assessment: Wisp of cotton
Abnormal: Absent of sensation and jaw weakness
V - TRIGEMINAL
CN
Eye movement side-to-side (AbduSIDE-TO-SIDE)
Motor
Assessment: Test for bilateral eye movement
Abnormal: Double Vision
VI – ABDUCENS
CN
Facial MOVEMENT
Anterior 2/3 of tongue sensation
Both
Assessment: Ask patient to smile and wrinkle forehead
Abnormal: Facial weakness
VII - FACIAL
Sense of hearing, balance, and coordination
Sensory
Assessment: Weber’s / Rinne Test and Romberg Test
Abnormal: Deafness and Impaired balance
VIII - VESTIBULOCOCHLEAR
CN
Swallowing
Posterior 1/3 of the tongue sensation
Both
Assessment: Food tasting
Problem: Augeusia / Dysphagia
IX – GLOSSOPHARYNGEAL
CN
Movement of Uvula / Gag Reflex
Parasympathetic sensation
Both
Assessment: Tongue Depressor
Abnormal: Absent Gag Reflex
X - VAGUS
CN
Neck movement
Motor
Assessment: Ask the patient to turn head and shrug shoulders
Problem: Weak / Absent Shoulder Shrug
XI - ACCESSORY
CN
Tongue movement
Motor
Assessment: Ask patient to move tongue side to side
Problem: Dysphagia / Slurred Speecj
XII - HYPOGLOSSAL
31 PAIRS SPINAL NERVES
CERVICAL – C1 – C8
THORACIC – T1 – T12
LUMBAR – L1 – L5
SACRAL – S1 – S5
COCYX - 1
DACALGG
C1 – C4 – Diaphragm
C5 – T1 – Arms
T2 – T6 – Chest
T7 – T12 – Abdomen
L1 – L5 – Legs
S1 – S3 – GI & GU
S4 – S5 – Genitals
Fight or Flight Response
Increase Everything; Decrease GI & GU
SYMPATHETIC NERVOUS SYSTEM
Dominates during relaxed situations
Decrease Everything; Increase GI & GU
PARASYMPATHETIC NERVOUS SYSTEM
Neuro Assessment
CEREBRAL FUNCTION
Assess degree of wakefulness / alertness
Note the intensity of stimulus to cause a response
Apply a painful stimulus over the nailbed with a blunt instrument
Ask questions to assess orientation to person, place, and time
GLASGOW COMA SCALE
3 Areas:
Eye Opening
Verbal Response
Motor Response
Scores Interpretation:
15 = highest score; patient is fully oriented and alert
<7 = comatose patient
3 = Deep coma
DIAGNOSTIC TEST
SKULL AND SPINAL X-RAY
Identifies fracture, dislocation, compression, and spinal cord problem
Nursing Care:
1. Provide support for the confuse of combative client
2. Remove metal items
3. Maintain immobilization
CT - SCAN
Used for diagnosing neurological disorder of the brain or the spine
Can detect:
1. Hemorrhage
2. Tumors
3. Abscess
Nursing Care:
1. Assess for iodine allergy
2. Instruct to lie still on a movable table
3. Inform the patient of possible discomforts
4. Remove any metallic object
MAGNETIC RESONANCE IMAGING
Used for diagnosis of degenerative diseases, intracranial and spinal abnormalities
Not useful when looking bony abnormalities
ELECTROENCEPHALOGRAPHY (EEG)
Graphic recording of electrical activity of the brain by placing electrodes to the scalp
Unilateral inflammation of CN 7 (Facial)
Cause:
Infection
Autoimmune
Viral Infection (Herpes simplex)
Signs and Symptoms:
Drooping of the eyelid (Ptosis)
Inability to close eye completely
Unilateral facial weakness (temporary)
BELL’S PALSY
Management:
1. Facial Massage (Moist Heat Massage)
2. Artificial tears
3. Antibiotics / Antiviral Drugs
4. Corticosteroids
5. Eye patch on affected side / sun glasses
6. Soft diet - Chew on the unaffected side
7. Avoid hot fluids / food
8. Facial Exercise (grimacing, wrinkling, puffing of cheeks, blowing of air
Bell’s Palsy
Other name: Tic Douloureux
Problem in CN 5 (Trigeminal)
Cause:
Chronic compression and irritation of CN 5
Degenerative changes in the Gasserian Ganglion
Pressure from surrounding tissue
Risk factors:
Patient with multiple sclerosis (Damage to myelin sheath around trigeminal nerve
Men with MS > Women with MS
Signs and Symptoms:
Sudden severe unilateral facial pain
Sensitive to extreme changes in temperature
Difficulty chewing
TRIGEMINAL NEURALGIA
other name of TRIGEMINAL NEURALGIA
Tic Douloureux