What structures make up the CNS?
Brain, spinal cord, cranial nerves I & II, and the retina.
How are the cerebral hemispheres connected?
By the corpus callosum.
What connects the brain to the head and facial structures?
Cranial nerves.
What does the ANS connect the CNS to?
Lungs, heart, stomach, intestines, bladder, and sex organs.
What are the functions of the Frontal Lobes?
Judgement/ problem solving, speech/ articulation (broca), voluntary movement, emotional state.
Main functions of the parietal lobe?
Spatial orientation, sensory integration and concept formation.
Main functions of the temporal lobe?
Auditory processing and formation of spoken memories.
Wernicke’s area - language area for comprehension.
Primary function of the occipital lobe?
Visual processing.
1 priority in any neuro assessment?
Changes in level of consciousness (LOC).
Correct order of LOC decline to monitor?
Conscious → confusion/agitation → lethargy → obtundation → stupor → deep coma.
Hallmarks of confusion.
Progressive disorientation, forgetfulness, difficulty following commands, restlessness/agitation.
Define lethargy.
A&Ox3 but very sluggish; sleeps often; awakens to voice or gentle touch.
Define obtundation.
Extremely drowsy, minimal responsiveness; requires vigorous stimulation; briefly arousable.
Define stupor.
Minimal movement; groans/moans; brief arousal only with repeated, forceful stimulation.
Define coma.
No response to verbal stimuli; does not speak; may show decorticate/decerebrate or no response to pain.
Three components of GCS.
Eye opening, best verbal response, best motor response.
GCS eye opening scores.
4 spontaneous, 3 to speech, 2 to pain, 1 none.
GCS verbal response scores.
5 oriented, 4 confused conversation, 3 inappropriate words, 2 incomprehensible sounds, 1 none.
GCS motor response scores.
6 obeys, 5 localizes pain, 4 withdraws, 3 abnormal flexion, 2 abnormal extension, 1 none.
Which cranial nerves are in the cerebrum?
CN I (olfactory) and CN II (optic).
Where are cranial nerves III–XII located?
Brainstem.
CN I and its bedside test.
Olfactory—smell identification.
CN II and its bedside test.
Optic—visual acuity/fields.
Example: “How many fingers?” “Read out loud this sentence on a piece of paper/package”
What are the primary roles of CN III?
Oculomotor—eyelid elevation and pupillary responses (accommodation, direct/consensual light).