Assessing the Neurological System and Mental Status Examination Flashcards
Right and Left
hemispheres joined by
the corpus callosum
Cerebrum
Four lobes
- Frontal
- Parietal
- Temporal
- Occipital
aggregation of neuronal cell bodies; mediates higher-level function (memory, perception,
communication, initiation
of voluntary movements)
Gray Matter
Regulate emotional expression,
behavior, intellect; influence personality; control voluntary
movement
Frontal Lobe
Influence hearing, smell, taste,
and memory
Temporal Lobe
Perceives and interpret sensory
inputs such as pain, temperature, touch, texture,
and proprioception
Parietal Lobe
Perceive and interpret visual
stimuli, including spatial relationships; Influence the
ability to read with
understanding
Occipital Lobe
Clusters multiple stimuli into a
coherent whole before sending it to the cerebral cortex for perception
Thalamus
Regulates production of several
hormones responsible for regulating water balance, appetite, vital signs, sleep cycles, pain perception, and emotional status
Hypothalamus
Regulates visual, auditory, and other reflexes and controls eye movements, focusing, and
pupil dilation
Midbrain
Helps control respiratory function, facial
movement and sensation, and eye movement
Pons
Regulates heart and respiratory rate, BP, and protective reflexes such as swallowing, vomiting, sneezing, and coughing
Medulla Oblongata
Coordination and smoothing of
voluntary movements,
maintaining equilibrium, and
maintenance of muscle tone
Cerebellum
- Located in the vertebral canal
- Extends from the medulla oblongata
to the first lumbar vertebra (L1) - Conducts sensory impulses up the ascending tracts to the brain
- Conducts motor impulses down the descending tracts to neurons that stimulate glands and muscles
throughout the body - Responsible for simple reflex activity
SPINAL CORD
Afferent
* Conducting or conducted
towards the brain
- Conducting or conducted
away from the brain
Efferent
- Anterior
Ventral
- Posterior
Dorsal
Sensations of pain, temperature, and crude an light touch
travel by the way of the
spinothalamic tract
Sensations of position, vibration and fine touch travel by way
of the
posterior columns
Impulses from the afferent fibers of the peripheral nerves are
carried through
the posterior root ganglion
control voluntary
skilled movement of the extremities and
fine movement of the fingers
Corticospinal tracts
voluntary control of
face, head, and neck
Corticobulbar tract
Pyramidal Tracts
Motor neurons original in the motor cortex
and travel down the medulla
Pyramidal Tracts
Extrapyramidal Tracts
Responsible for INVOLUNTARY control and modulation like
tone and balance
Originate in the brainstem
Extrapyramidal Tracts
Responsible for fine motor control
Rubrospinal tract (midbrain)
facilitates contraction and increases tone
Pons
inhibits ontraction, decreases tone, and automatic breathing
Medulla
Involved in balance and posture
Vestibulospinal tract
Involved in the coordinate head and eye coordination
Tectospinal (Colliculospinal) tract
Carries smell impulses
from nasal mucous
membrane to brain
- Olfactory Nerve
Carries visual impulses
from eye to brain
Optic Nerve
Contracts eye muscles to control eye movements (superolateral,
superomedial, inferolateral, and medial), constricts pupils, and elevates eyelid
Oculomotor Nerve
Contracts superior oblique muscle to
control inferomedial eye movement
- Trochlear Nerve
Trigeminal NerveMotor: Chewing and jaw opening and clenching Sensory: Conveying sensory
data from eyes (cornea), nose, mouth, teeth, jaw, forehead,
scalp, and facial skin
Trigeminal Nerve
Trigeminal Nerve
3 divisions:
Ophthalmic,
Maxillary,
and Mandibular
Abducens Nerve
Controls lateral eye
movements
Abducens Nerve
Motor: Closing eyes, closing
mouth, moving lips and other
muscles of facial expression,
salivation and lacrimation
Sensory: Tasting on anterior
tongue
Facial Nerve
Facial Nerve Branches:
Branches: Temporal, Zygomatic,
Buccal, Mandibular, Cervical
Contains sensory fibers for
hearing and balance
Acoustic/
Vestibulocochlear nerve
Hearing Pathways
Conductive phase
Sensorineural phase
Sensory: Contains sensory fibers for taste on posterior third of
tongue and sensory fibers of the pharynx that result in the gag
reflex when stimulated
Motor: Provides secretory fibers to the parotid salivary glands; promotes swallowing
movements
Glossopharyngeal Nerve
Carries sensation from the
throat, larynx, heart, lungs,
bronchi, gastrointestinal tract,
and abdominal viscera
Vagus Nerve
Innervates neck muscles
(sternocleidomastoid and
trapezius) that promote
movement of the shoulders and head rotation
Spinal Accessory Nerve
Innervates tongue muscles that promote the movement of food and talking
Hypoglossal Nerve
31 pairs (8 cervical, 12 thoracic, 5 sacral, 1
coccygeal)
SPINAL NERVES
The sensory root of each spinal nerve innervates
an area of the skin called a
DERMATOME
Remember SAME DAVE
Remember SAME DAVE
Sensory Afferent
Motor Efferent
Dorsal Afferent
Ventral Efferent
activated
during stress and elicits responses such as
decreased gastric secretions, bronchiole
dilatation, increased pulse rate, and pupil
dilation; arise from the thoracolumbar level
(T1 to L2)
Sympathetic nervous system
Parasympathetic nervous system:
restore and
maintain normal body functions like
decreasing the heart rate; arise from the
craniosacral regions (S1 to S4 and CN III, VI, IX,
and X)
Impulses are carried by both
cranial and
spinal nerves
an auditory, visual, or motor sensation that forewarns the
client that a seizure is about to occur
Aura
“fainting” sensation
Dizziness
sensation that the
surroundings are spinning around or that the person is spinning around; often accompanied by nausea and vomiting, nystagmus, and tinnitus
Vertigo
temporary loss of
consciousness
- Syncope
numbness or tinglin
Paresthesia –
Deficit in the Five Senses
– sense of smell
CN I
Deficit in the Five Senses
visual acuity, pupillary constriction, and
extraocular movement
CN II, III, IV, and VI –
Deficit in the Five Senses
– taste
CN VII and IX
Deficit in the Five Senses
– hearing
CN VIII
Deficit in the Five Senses
– somatic sensations
CN V and dermatomes