A neurological assessment evaluates the integrity of the central and peripheral nervous systems. Nurses perform this examination during admission, routine shift changes, or whenever a patient shows signs of neurological decline. Establishing a baseline is the primary goal because early detection of subtle changes prevents catastrophic complications like brain herniation or irreversible ischemia. Systematic progression through distinct segments ensures no critical deficit is overlooked.
Gathering a targeted health history clarifies current neurological complaints and contextualizes physical findings. Common chief complaints include headaches, dizziness, weakness, numbness, and sudden changes in vision or speech.
Level of consciousness is the most sensitive indicator of neurological function. The Glasgow Coma Scale (GCS) evaluates eye opening, verbal response, and motor response, yielding a score between 3 and 15. Mental status testing further evaluates orientation to person, place, and time, alongside memory and abstract thinking.
| GCS Category | Parameter Tested | Minimum Score | Maximum Score |
|---|---|---|---|
| Eye Opening | Spontaneous to painful stimuli | 1 | 4 |
| Verbal Response | Confused to oriented conversation | 1 | 5 |
| Motor Response | Flexion withdrawal to obeying commands | 1 | 6 |
Testing the twelve cranial nerves localizes specific brainstem or peripheral nerve lesions. Each nerve requires a distinct bedside test.
Evaluating motor function involves inspecting muscle bulk, testing tone, and grading strength on a standard scale from 0 (no movement) to 5 (normal power against full resistance). Involuntary movements like tremors or fasciculations must be documented.
Coordination relies on cerebellar function. Tests include finger-to-nose movements, rapid alternating hand movements, and heel-to-shin sliding. The Romberg test assesses proprioception and balance; standing with feet together and eyes closed, a loss of balance indicates a positive sign.
Sensory pathways convey tactile, pain, temperature, and proprioceptive inputs to the cerebral cortex. The nurse tests superficial pain using a safe, disposable pin, and light touch using cotton wool, always comparing symmetrical body areas. Cortical sensory functions include stereognosis, the ability to identify a familiar object placed in the hand by touch alone, and graphesthesia, recognizing numbers traced on the palm.
Reflex arcs evaluate the communication between peripheral nerves and the spinal cord without requiring higher cerebral processing. Deep tendon reflexes—such as biceps, triceps, patellar, and achilles—are graded on a 0 to 4 scale, where 2+ is normal. Hyperreflexia (3+ or 4+) points to upper motor neuron lesions, while hyporeflexia (0 or 1+) indicates lower motor neuron pathology. The plantar response checks for the Babinski sign; dorsiflexion of the big toe in adults signifies central nervous system disease.
Bedside assessments are frequently supplemented by diagnostic imaging and invasive monitoring. Computed tomography (CT) scans and magnetic resonance imaging (MRI) visualize structural abnormalities, hemorrhages, or ischemic infarcts. Intracranial pressure (ICP) monitoring devices measure cerebral perfusion dynamics in critical care units. Nurses monitor ICP waveforms to ensure adequate cerebral perfusion pressure, preventing secondary brain injury.
Clear, objective documentation ensures continuity of care across multidisciplinary teams. Nurses must record exact numerical scores, precise descriptive details, and the time of every assessment rather than vague terms like 'alert' or 'dull'. Prompt reporting of deteriorating trends to the medical team is a core nursing responsibility. Maintaining patient safety through fall precautions and seizure precautions remains paramount throughout the monitoring period.