Neurological tests are essential clinical assessments used by healthcare professionals to evaluate brain function following a head injury. These tests do not typically involve complex machinery in the first instance. Instead, they focus on physical and cognitive indicators that show how well the brain is communicating with the rest of the body. When a person sustains a concussion, the brain experiences a temporary metabolic crisis that can affect anything from balance and vision to memory and speech. By performing specific, repeated checks, clinicians can determine the severity of the injury and monitor for any signs of deterioration.
What We’ll Discuss in This Article
- The role of the Glasgow Coma Scale in assessing levels of consciousness.
- How pupillary response tests provide a window into brainstem health.
- The importance of motor and sensory exams for coordination and strength.
- Cognitive and orientation checks used to identify memory gaps or confusion.
- The clinical frequency of neurological observations during recovery.
- A comparison between functional bedside tests and structural imaging like CT scans.
The role of the Glasgow Coma Scale in concussion assessment
The Glasgow Coma Scale is a clinical tool used by UK healthcare professionals to objectively measure a person’s level of consciousness after a head injury. This scale is the foundation of neurological testing in every UK emergency department and minor injury unit. It provides a score based on three specific categories of response: eye opening, verbal communication, and motor movement. A person who is fully awake and behaving normally will receive a maximum score of 15, while lower scores indicate varying degrees of brain dysfunction or impairment.
During a concussion assessment, the Glasgow Coma Scale is used not just once but multiple times. This allows medical staff to see a “trend” in the patient’s condition. If the score remains high, it is a reassuring sign that the brain’s primary functions are stable. If the score begins to drop, it serves as an immediate red flag that the individual may be experiencing increased pressure inside the skull or internal bleeding. This objective scoring system ensures that even subtle changes in a patient’s neurological state are caught and acted upon quickly.
Pupillary response and visual neurological checks
One of the most vital physical tests performed after a head injury involves checking the pupils, which are the black centres of the eyes. Doctors and nurses use a small penlight to see how quickly the pupils constrict when exposed to light. Under normal circumstances, both pupils should be equal in size and react quickly and symmetrically. Because the nerves that control the pupils originate deep within the brainstem, this test provides a direct and non-invasive way to check the health of the brain’s most critical structures.
If one pupil is larger than the other, or if they do not react to light, it can indicate significant pressure on the brain or a serious traumatic injury. In the context of a mild concussion, visual checks also include assessing “tracking,” where the patient follows a moving finger with their eyes. This helps identify issues with coordination and the vestibular system, which is often affected during a jolt to the head. Patients may report symptoms like double vision or blurriness during these tests, which are important markers for the recovery plan.
Assessing motor function and physical coordination
A neurological exam always includes a thorough check of the motor system to ensure the brain is sending clear signals to the muscles. Clinicians will typically ask the patient to squeeze their hands, push and pull with their arms, and move their legs against resistance. This allows them to identify any “focal” weakness, which is weakness that only affects one side of the body. One-sided weakness is a major red flag that suggests an injury beyond a simple concussion.
Coordination and balance are also assessed through bedside tests. A common check is the “finger to nose” test, where the patient must touch their own nose and then the clinician’s finger repeatedly. Another is the “gait assessment,” where the patient is observed walking a short distance. Because the cerebellum, located at the back of the brain, manages balance, any staggering or inability to stay upright can indicate that this region has been impacted by the injury. These physical tests help clinicians understand the functional impact of the concussion on the patient’s daily mobility.
Cognitive and orientation screening
A concussion is a temporary injury to the brain caused by a bump, blow, or jolt to the head, and it frequently affects a person’s ability to think clearly and remember information. To assess this, healthcare providers perform cognitive screening or orientation checks. This often involves asking simple questions to see if the patient knows who they are, where they are, and what the current date or time is. These are known as questions of “person, place, and time.”
In addition to basic orientation, clinicians may test “working memory” by asking the patient to repeat a short list of words or perform simple mental arithmetic, such as counting backwards from 20. Confusion, a slow response time, or a total inability to recall the moments surrounding the injury (amnesia) are standard indicators of a concussive event. These cognitive tests are essential because a patient might look physically fine and have perfect limb strength but still have significant internal brain dysfunction that requires rest and monitoring.
Bedside assessments versus structural imaging
It is important for patients to understand that neurological tests assess how the brain is “working,” while imaging like CT or MRI scans looks at how the brain “looks.” In the vast majority of concussions, the brain’s structure appears completely normal on a scan, even when neurological tests show clear functional problems. This is why bedside assessments are often more valuable for managing a concussion than a picture of the brain.
The following table compares functional neurological tests with structural brain imaging:
| Feature | Neurological Bedside Tests | Structural Brain Imaging (CT/MRI) |
| Primary Goal | Checks brain function and signals. | Looks for bleeds or fractures. |
| Detects Concussion? | Yes, identifies functional issues. | No, usually appears normal. |
| When it is used | Every head injury assessment. | Only if “red flags” are present. |
| Assessment tool | GCS, pupils, motor, cognitive. | X-rays or magnetic fields. |
| Duration | Performed repeatedly over 48 hours. | Usually a one-off emergency check. |
| Key Indicator | Changes in awareness or coordination. | Visible blood or bone damage. |
The frequency of observations during recovery
In the UK, if a patient is admitted to a hospital or clinical setting for observation after a head injury, neurological tests are performed on a strict schedule. This protocol is designed to ensure that if a patient’s condition begins to worsen, it is caught in the earliest possible stages. Initially, these checks may occur every 15 to 30 minutes, and as the patient remains stable, the frequency is gradually reduced to every hour and then every four hours.
This repetitive testing is necessary because some brain injuries, such as slow-developing bleeds, do not show their full effects immediately. A patient may pass their first neurological exam but fail one four hours later. For those managed at home, the NHS recommends a similar approach, where a responsible adult checks on the person every few hours for the first 48 hours to ensure they remain alert and responsive. The key is not to look for perfection in the tests, but to look for stability and steady improvement.
Conclusion
Neurological tests are the primary way healthcare professionals monitor the brain’s recovery after a concussion. By evaluating consciousness, pupil reactions, coordination, and cognitive clarity, clinicians can safely manage most head injuries without the need for radiation-heavy scans. Stability in these tests over the first 48 hours is the most reliable indicator of a safe recovery path.
If you experience severe, sudden, or worsening symptoms, call 999 immediately.
What does a “perfect” GCS score of 15 mean?
A score of 15 means the patient is fully alert, speaking coherently, and able to follow all motor commands, which is a very positive sign after a head injury.
Why do they keep asking me what day it is?
Repeating orientation questions helps clinicians identify “fluctuating consciousness,” where a patient may seem fine one minute but become confused the next.
Can a nurse perform neurological tests or do I need a doctor?
UK nurses are highly trained in performing neurological observations and GCS scoring, and they are often the primary monitors for stable head injury patients.
Does a normal neurological exam mean I don’t have a concussion?
Not necessarily; a concussion can still exist even if your initial tests are normal, which is why symptoms like headaches and dizziness must still be managed with rest.
Is testing different for children who can’t talk yet?
Yes, there is a “Pediatric Glasgow Coma Scale” that uses different criteria for verbal and motor responses based on the child’s developmental age.
Will these tests show if I have a brain bleed?
While the tests themselves don’t see the blood, the symptoms they reveal, such as dropping GCS scores or unequal pupils, are the primary indicators that a bleed may be present.
Should I perform these tests on myself at home?
It is difficult to test your own neurological function; it is much safer to have another adult monitor your behaviour and alertness using basic “rousability” checks.
Authority Snapshot (E-E-A-T Block)
This guide was created by the MyPatientAdvice Medical Content Team and reviewed by Dr. Stefan Petrov to provide safe, evidence-based information for the public. The content is strictly aligned with the clinical assessment and observation standards established by the NHS and the National Institute for Health and Care Excellence (NICE). Our priority is to help patients and families understand the medical protocols used to ensure safety following a head injury.
