Doctors use neurological exams to evaluate the brain’s function by testing memory, attention, movement, reflexes, and sensory responses. During these exams, a neurologist or internist checks how well the brain and nervous system are working by asking specific questions, observing physical coordination, tapping reflexes with a small hammer, and asking patients to perform simple tasks like touching their nose or following a moving object with their eyes. For a person showing early signs of memory loss, a typical neurological exam might include asking them to recall three words after five minutes (most healthy people remember all three; someone with mild cognitive impairment might forget one or two), testing their ability to copy a drawing of intersecting pentagons, or checking whether they can calculate 100 minus 7 repeatedly.
The neurological exam serves as a screening tool—it helps doctors identify cognitive and physical changes that might suggest dementia or other brain conditions. However, the exam alone cannot diagnose dementia. Instead, it flags which cognitive domains (memory, language, reasoning, attention) are affected and helps guide whether additional testing like brain imaging or blood work is needed. A doctor might notice that a patient struggles with word-finding but has intact memory, or vice versa, which points toward specific types of neurological problems.
Table of Contents
- What Cognitive Abilities Do Doctors Test During These Exams?
- Motor and Neurological Testing—What Does a Neurologist Look For?
- Balance, Coordination, and Gait Assessment
- Reflex Testing and Sensory Examination
- The Cranial Nerves and Higher Cortical Functions
- Why Additional Testing Follows the Neurological Exam
- What to Expect and How to Prepare for a Neurological Exam
- Frequently Asked Questions
What Cognitive Abilities Do Doctors Test During These Exams?
Doctors test a range of mental functions to build a picture of cognitive health. They assess memory in three ways: immediate recall (can you repeat back these three words I just said?), short-term memory (can you remember those same three words after five minutes?), and long-term memory (do you recall what you had for breakfast, or who is the president?). They also evaluate attention by asking patients to recite days of the week backward or subtract 7 from 100 repeatedly—a test that sounds simple but requires sustained focus, and is often where early cognitive decline shows up first. Language is assessed through word-finding (naming common objects like a watch or pen), repeating phrases, and comprehension (following multi-step commands such as “touch your left ear with your right hand”).
Executive function—the brain’s ability to plan, organize, and solve problems—is tested through tasks like drawing a clock face set to a specific time (10:10) or arranging blocks to match a pattern. These tests reveal whether someone can think through a multi-step task. Visuospatial awareness, or the ability to understand spatial relationships, is tested by copying drawings or identifying what an object is when rotated. A patient with Lewy body dementia, for example, might perform well on memory tests but fail badly at the clock-drawing test, whereas someone in the early stages of Alzheimer’s disease typically shows memory loss first while spatial skills remain intact longer.
Motor and Neurological Testing—What Does a Neurologist Look For?
During the motor portion of the exam, the doctor watches how the patient walks into the exam room and rises from a seated position. They then test muscle strength by asking the patient to push or pull against the doctor’s hand in different positions (pushing the foot down tests calf strength; pulling up tests shin strength; gripping strength is tested with a handshake). The doctor is looking for asymmetry—one side of the body significantly weaker than the other—which can indicate a stroke or localized neurological problem.
Gait disturbance (shuffling, slow walking, stiffness) is common in vascular dementia and Lewy body dementia but can also be a medication side effect or sign of Parkinson’s disease. A critical limitation of motor testing is that it can look normal in early Alzheimer’s disease, which affects memory and thinking before affecting movement. This means a patient might have significant dementia on memory tests yet have normal strength and coordination, which can be confusing for family members who assume that cognitive decline must accompany physical changes. Reflexes are tested by striking the patellar tendon below the knee, the Achilles tendon, and other sites with a reflex hammer—brisk reflexes in some dementia patients can suggest Lewy body or frontotemporal dementia, whereas very slow or absent reflexes may indicate a different neurological problem altogether.
Balance, Coordination, and Gait Assessment
The doctor observes balance through several tests. The Romberg test (standing with feet together and eyes closed) checks whether balance depends on vision—if someone falls or staggers when their eyes are closed but is stable with eyes open, it suggests a problem with proprioception (awareness of body position in space) rather than pure balance. Tandem walking, or walking heel-to-toe in a straight line, also reveals balance problems.
The doctor may watch how quickly someone can alternate between tapping their thumb and fingers, or how quickly they can tap their foot—slower or irregular alternating movements (dysdiadochokinesia) can point toward cerebellar problems or certain types of dementia. One specific example: a 72-year-old woman with early-stage Alzheimer’s disease had a normal gait and could pass all balance tests, so her family and primary care doctor didn’t suspect significant cognitive decline until she got lost driving to a familiar location and her husband insisted on neurological testing. By contrast, a 70-year-old man with vascular dementia after a series of small strokes had a noticeably shuffling gait, took much longer to rise from a chair, and had visible difficulty with the tandem walk test—his physical findings correlated with his cognitive decline and helped the doctor suspect vascular cause rather than Alzheimer’s. The takeaway is that normal motor findings do not rule out dementia, and conversely, motor problems are not required for dementia diagnosis.
Reflex Testing and Sensory Examination
Reflexes are assessed by striking specific tendons with a small hammer and observing how quickly the muscle contracts. Hyperreflexia (overactive reflexes) or the presence of abnormal reflexes like the Babinski sign (where the big toe points upward instead of downward when the sole of the foot is stroked) can suggest upper motor neuron problems. Sensory testing checks whether the patient can feel light touch, temperature (using a cold tuning fork or small glass), and vibration (using a vibrating tuning fork placed on the ankle or knee).
Problems with vibration sense and position sense often appear in patients over 75, even without dementia, so the doctor interprets sensory findings in context. A comparison: in Alzheimer’s disease, reflexes and sensory testing are typically normal because the disease affects the brain’s gray matter but not the spinal cord or peripheral nerves. In contrast, in frontotemporal dementia, which can affect motor neurons as it progresses, a patient might show hyperreflexia or even fasciculations (visible muscle twitches under the skin). If a patient has abnormal sensory findings, the doctor considers whether a separate problem like diabetes, vitamin B12 deficiency, or peripheral neuropathy is present—these conditions can coexist with dementia and complicate interpretation of the exam.
The Cranial Nerves and Higher Cortical Functions
There are 12 pairs of cranial nerves—the neurologist tests many of them during a brief examination. The olfactory nerve (smell) is tested because loss of smell can be an early sign of Lewy body dementia or Parkinson’s disease. The optic nerve is checked through visual acuity and visual fields (the doctor moves their fingers in the patient’s peripheral vision to ensure they can see them). The oculomotor nerves are tested by watching eye movements—slowed or restricted eye movements can indicate Lewy body dementia or progressive supranuclear palsy. Facial symmetry is assessed, speech is listened to for slurring or hesitations, and tongue movement is observed.
A major limitation of the standard neurological exam is that it may miss frontotemporal dementia in early stages. Frontotemporal dementia often begins with personality changes or behavioral problems—a person becomes more impulsive, withdrawn, or socially inappropriate—while memory and motor function remain relatively normal. The doctor’s exam shows no clear deficit, and the patient is sometimes mislabeled as having depression or a psychiatric problem rather than dementia. Additionally, some neurological findings can be misinterpreted: tremor at rest might suggest Parkinson’s disease, but it also occurs in some anxiety disorders or essential tremor, neither of which is dementia. This is why the neurological exam is always combined with clinical history and cognitive testing, not interpreted in isolation.
Why Additional Testing Follows the Neurological Exam
The neurological exam provides a snapshot of how the nervous system is functioning, but it cannot identify the cause of dementia or measure the extent of brain damage. MRI or CT imaging is often ordered after the exam to rule out stroke, bleeding, tumors, or normal pressure hydrocephalus—conditions that can mimic dementia but are sometimes treatable. Blood tests screen for vitamin B12 deficiency, thyroid dysfunction, or syphilis, all of which can cause cognitive symptoms.
Cognitive testing, such as the Montreal Cognitive Assessment (MoCA) or Mini-Cog, is more sensitive for detecting mild cognitive impairment than the brief bedside tests done during the neurological exam. In some cases, a neurological exam revealing asymmetric weakness might prompt urgent imaging because of concern for acute stroke, whereas normal findings might lead to outpatient neuropsychological testing to characterize the cognitive impairment more thoroughly. Lumbar puncture is rarely performed in dementia workup but might be considered if the clinical presentation is atypical or infectious disease is suspected.
What to Expect and How to Prepare for a Neurological Exam
A typical neurological exam takes 15 to 30 minutes. The patient will be asked to perform tasks ranging from simple (touch your nose, follow my finger with your eyes) to moderately complex (recall three words after a delay, copy a drawing, recite months backward). There is no studying for a neurological exam—the doctor is assessing current function, not knowledge.
However, it helps to get enough sleep the night before, arrive on time to avoid rushed testing, and bring a list of current medications and supplements, because some drugs (sleeping pills, anti-anxiety medications, pain medications) can affect performance on cognitive tests. The patient should also mention any recent illness, stress, or sleep deprivation, because these factors can temporarily reduce cognitive performance. For someone with early dementia, having a close family member or caregiver present during the exam is often helpful; the caregiver can provide history (Has memory loss been gradual or sudden? Has personality changed?) that the patient themselves may not notice or remember clearly. After the exam, the doctor will explain findings and may recommend follow-up imaging, blood work, or referral to a neurologist or memory specialist if the results suggest dementia.
Frequently Asked Questions
Can a neurological exam definitively diagnose dementia?
No. The neurological exam helps identify cognitive and motor changes that warrant further testing, but diagnosis requires a combination of the exam, cognitive testing, imaging, blood work, and clinical history. Some patients with normal neurological exams have significant cognitive decline; conversely, some brain changes are found on imaging in people with no cognitive symptoms.
What if my neurological exam is completely normal but I’m still having memory problems?
A normal exam does not rule out mild cognitive impairment or early dementia. The exam may be normal in early Alzheimer’s disease because the disease starts in the temporal lobe (memory center) and progresses before affecting motor or reflex function. Further cognitive testing and imaging are recommended if symptoms persist.
How often do neurological exams need to be repeated?
This depends on the diagnosis and clinical situation. If dementia is diagnosed, a neurological exam might be repeated annually or every few years to track changes in motor function, balance, or the development of new findings. If no diagnosis was made, exams are often repeated only if new symptoms appear.
Why does my doctor use a small hammer and ask me to move my eyes back and forth?
The hammer tests reflexes, which reveal whether the spinal cord and nerve pathways are intact. Eye movement testing checks the cranial nerves (pairs of nerves in the brain) and can reveal signs of specific types of dementia like Lewy body disease or progressive supranuclear palsy.
Can medications affect the results of a neurological exam?
Yes. Sedating medications, anti-anxiety drugs, pain medications, and even some blood pressure medications can slow thinking and movement during the exam. Always tell your doctor what medications you are taking before the exam, and if possible, have the exam done in the morning when you are most alert.
Is it normal to feel nervous during a neurological exam?
Yes. Anxiety can affect performance on cognitive tasks like recalling words or drawing, so let your doctor know if you are anxious. Some people also perform worse if they feel rushed or tested. A good neurologist will provide a calm, unhurried environment and will interpret results with this context in mind.
