Arm-raising and other upper-limb movements seen in dying or brain-dead patients are involuntary spinal reflexes, not conscious gestures. The most studied version of this phenomenon is called the Lazarus sign, named after the biblical figure raised from the dead. It occurs because the spinal cord contains its own motor circuits that can generate surprisingly complex movements once the brain’s usual inhibitory control is removed. For families and even some clinicians, these movements can be deeply unsettling, but they do not indicate awareness, pain, or any return of brain function.
What the Lazarus Sign Actually Looks Like
The Lazarus sign involves involuntary movements of the upper limbs in patients who have been declared brain dead. These are not subtle twitches. The arms may rise from the bed, flex at the elbows, cross over the chest, or even briefly reach toward the face or endotracheal tube. In some documented cases, the hands come together as if in prayer. The movements can look so purposeful that they have been mistaken for signs of consciousness or recovery.1PubMed. Lazarus Sign, a Misnomer to an Anatomical Spinal Reflex
What makes the Lazarus sign distinct from other end-of-life movements is the context in which it occurs. By definition, it happens in patients whose brains have completely and irreversibly ceased functioning. The movements are often triggered by specific events, such as disconnection from a ventilator or the testing procedures used to confirm brain death. They tend to be brief, lasting seconds to a few minutes, though their dramatic appearance can leave an impression far out of proportion to their duration.
Why the Spinal Cord Can Move the Body Without the Brain
Your spinal cord is not just a cable carrying signals from brain to body. It contains its own networks of neurons capable of organizing movement patterns. Under normal conditions, the brain constantly modulates and suppresses many of these spinal circuits, keeping them in check. When the brain dies, that top-down inhibition vanishes. The spinal motor circuits, now free from restraint, can fire on their own in response to local stimuli like changes in oxygen levels, temperature shifts, or mechanical triggers such as the removal of ventilator support.
A 2025 paper in Medical Hypotheses proposed a detailed neurophysiological model for the Lazarus sign, describing it as a motor response generated entirely by propriospinal structures, meaning spinal cord pathways that connect different spinal levels to one another without ever routing through the brain. The researchers noted that the characteristic pattern of arm flexion and thoracic respiratory-like movements aligns with known spinal reflex arcs that are normally kept dormant by descending brain signals.2Medical Hypotheses. The Lazarus’ sign: A novel hypothesis on its hodology and neurophysiological mechanisms
This is the same basic principle behind much simpler spinal reflexes you experience in everyday life. When a doctor taps your knee with a rubber hammer, the resulting kick happens without any input from your brain. The circuit runs entirely through the spinal cord. The Lazarus sign is a far more elaborate version of the same idea, involving coordinated movement across multiple joints, but the underlying logic is the same: the spinal cord has the hardware to generate movement independently.
How Common Are These Movements
The Lazarus sign is considered a rare occurrence overall, but “rare” might understate how often it actually happens. The movements tend to be documented primarily in cases where they cause confusion or delay clinical decisions, which means milder or briefer episodes may go unrecorded. Some researchers suspect the true incidence is higher than published case reports suggest, because clinicians who are familiar with the phenomenon simply note it and move on without writing it up.3PubMed Central. Chronic Brain-Dead Patients Who Exhibit Lazarus Sign
A broader category of spinal reflexes beyond just the Lazarus sign is actually quite common in brain-dead patients. These can include finger jerks, toe curls, undulating abdominal movements, and neck flexion. The Lazarus sign stands out because the arm movements are large, visible, and easy to interpret as purposeful, but it is part of a wider spectrum of spinal activity that persists after brain death.
Why These Movements Disturb Families and Clinicians
Even medical professionals who understand the neurology can find the Lazarus sign jarring. For families at the bedside, who may have just been told their loved one is brain dead, watching the person raise their arms or appear to reach out can be devastating. It understandably leads to questions: Is the person still alive? Are they in pain? Did the doctors get the diagnosis wrong?
The answer to all three is no, but the emotional impact is real. Research published in Transplant Proceedings noted that spinal reflexes in brain-dead patients can delay critical decisions, including whether to proceed with organ donation. Families who witness these movements may become convinced that the brain-death determination was premature, and even some physicians involved in the process can be thrown off by them.4PubMed. Frequency of spinal reflex movements in brain-dead patients
The clinical consensus is that better awareness of spinal reflexes among both healthcare teams and families would prevent much of this distress. When families are warned in advance that movements may occur and are given a clear explanation of their spinal origin, the response tends to be much less traumatic. Some hospitals now include this information in their brain-death communication protocols, though the practice is far from universal.
When Brain-Dead Patients Survive Far Longer Than Expected
One of the more surprising findings in this area involves brain-dead patients who continue to show the Lazarus sign over extended periods. Conventional medical understanding holds that cardiac arrest typically follows brain death within about a week. However, a case report from the Korean Journal of Neurotrauma described two patients who exhibited the Lazarus sign and survived on life support for over 100 days after brain death was diagnosed.3PubMed Central. Chronic Brain-Dead Patients Who Exhibit Lazarus Sign
These cases challenge assumptions about the timeline of bodily deterioration after brain death. If the spinal cord and the rest of the body can maintain enough physiological stability to keep producing complex reflexes for months, it raises interesting questions about where the boundaries of “life” and “death” really sit. For clinicians, these cases are medically well-understood: the brain is dead, and the spinal movements are reflexive. But for ethicists and the public, they complicate an already difficult conversation about what it means to die.
Arm Movements During Active Dying, Not Just Brain Death
The Lazarus sign is specific to brain-dead patients, but arm-raising and other limb movements also occur during the broader process of dying, even in people who are not brain dead. These have somewhat different causes. In actively dying patients who still have some brain function, involuntary movements can result from a few overlapping mechanisms.
As circulation fails and the brain receives less oxygen and glucose, normal inhibitory signaling breaks down. The result can be myoclonus, which refers to sudden, brief muscle jerks, or more sustained posturing of the limbs. Seizure-like activity can also occur in the final minutes of life as the brain’s electrical activity becomes chaotic. These movements may involve the arms rising, the back arching, or the jaw clenching.
Terminal restlessness is another end-of-life phenomenon that sometimes involves arm movements. Patients in the final hours or days of life may become agitated, pick at bedsheets, reach into the air, or make repetitive motions with their hands and arms. The exact cause is debated, but it likely involves a combination of metabolic disturbance, medication effects, pain, and the brain’s deteriorating ability to process sensory input. Unlike the Lazarus sign, terminal restlessness occurs in patients who still have brain activity, and it can sometimes be managed with palliative sedation. Midazolam, a benzodiazepine commonly used in palliative care, is one of the drugs used to ease agitation and involuntary muscle activity in dying patients.5PubMed Central. Midazolam: an essential palliative care drug
For someone at the bedside, the distinction between spinal reflexes in a brain-dead patient and terminal restlessness in an actively dying patient may not be obvious. Both can involve the arms moving in ways that look purposeful. The key difference is the clinical context and what it implies about suffering: in brain death, there is no possibility of awareness or pain; in terminal restlessness, the patient may still have some residual experience, which is why palliative treatment is offered.
Terminal Burrowing and Other Involuntary Behaviors Near Death
The Lazarus sign is not the only involuntary behavior that surprises people near the end of life. Terminal burrowing is a phenomenon documented primarily in deaths from severe hypothermia. Victims are sometimes found in small, enclosed spaces, such as under beds, inside wardrobes, or burrowed into piles of clothing, having apparently crawled there during their final moments. Forensic investigators initially found these positions puzzling, but research identified the behavior as an autonomous brainstem process triggered in the final stages of hypothermia, resembling the burrowing behavior of hibernating animals.6PubMed. “Terminal burrowing behaviour”–a phenomenon of lethal hypothermia
Like the Lazarus sign, terminal burrowing is a reminder that the body has ancient, hard-wired motor programs that can activate when higher brain functions fail. The brainstem and spinal cord evolved long before the cerebral cortex, and their circuits are more robust and resistant to metabolic insult. As the “newer” parts of the nervous system shut down, these older circuits can briefly take over, producing behaviors that look deliberate but are entirely automatic.
Another related phenomenon is paradoxical undressing, often seen alongside terminal burrowing in hypothermia deaths. As the body’s temperature regulation collapses, victims sometimes remove their clothing in the final stages, possibly due to a sudden and misleading sensation of warmth caused by peripheral blood vessels dilating. Investigators unfamiliar with the phenomenon have sometimes mistaken these deaths for crimes, since the victim is found partially undressed in an unusual location. Understanding the involuntary nature of these behaviors has been important for forensic medicine.
Reflexive Movement After Death in Other Species
Humans are not the only animals whose bodies move after the brain ceases to function. Post-mortem movement driven by spinal circuits has been observed across vertebrate species. Research on the post-decapitation reflex in rats found that the reflex, which involves coordinated limb movements after removal of the head, follows a developmental timeline linked to spinal cord maturation. The reflex was absent in the youngest and oldest animals tested but present in an intermediate age range, suggesting that spinal motor circuits have a window of peak autonomous capability that changes over the lifespan.7PubMed. The ontogeny of spinal cord monoamines and the post-decapitation reflex
Anyone who has seen a freshly caught fish continue to thrash on a deck or a headless chicken run around a farmyard has witnessed the same basic principle at work. These movements are not signs of life or suffering in any meaningful sense. They are the spinal cord running through its remaining repertoire of motor programs without any guidance from above. In humans, the same phenomenon simply takes a form that is harder for us to accept as reflexive, because it looks so much like something a living person would do on purpose.
Why the Name “Lazarus Sign” Gets Criticism
Some researchers have argued that calling this phenomenon the “Lazarus sign” is a misnomer that actively contributes to misunderstanding. The biblical Lazarus was raised from the dead, which implies a return to life. The arm movements in brain-dead patients involve no such return. Using a name that evokes resurrection may prime families and even clinicians to interpret the movements as evidence that the patient is “coming back,” which is the opposite of what is happening.1PubMed. Lazarus Sign, a Misnomer to an Anatomical Spinal Reflex
A 2025 paper in Clinical Anatomy explicitly called the name a misnomer and argued for reframing the phenomenon as an anatomical spinal reflex, stripping away the religious and dramatic connotations. Whether or not the medical community adopts new terminology, the point is worth considering. Language shapes perception, and in a situation where a family is trying to process the death of someone they love, a name that suggests miraculous revival is not just inaccurate but potentially harmful.
The broader medical vocabulary around death is full of similar issues. Terms like “life support” imply that what is being supported is life, even when the patient is brain dead and the machines are maintaining organ perfusion for potential donation. “Withdrawal of care” suggests abandonment rather than a recognition that the patient has died. These linguistic choices are not trivial; they shape how both the public and medical professionals think about the boundaries between life and death, and they can make already painful decisions harder than they need to be.
What Palliative Teams Wish Families Knew
If you are at the bedside of a dying loved one and you see their arms move, reach up, or seem to gesture, the instinct to read meaning into the movement is completely natural. Palliative care professionals emphasize that these reflexive movements are not signs of distress, awareness, or an attempt to communicate. In brain-dead patients, the movements are purely spinal. In actively dying patients who may still have some brain activity, medications can be adjusted to address any possibility of discomfort.
The most useful thing families can do is ask the medical team what to expect before it happens. Many end-of-life movements, from myoclonus to the Lazarus sign, are predictable enough that clinicians can warn families in advance. Knowing that the body might move, and understanding why, does not erase the emotional weight of watching it happen, but it can prevent the specific anguish of thinking your loved one is suffering or that a medical error has been made. Hospitals and hospices that include this information in their family education materials report that it meaningfully reduces confusion during an already overwhelming time.4PubMed. Frequency of spinal reflex movements in brain-dead patients