How Is Neurosurgery Done? Procedure, Steps and What to Expect

Published: 10 July 2026  |  Expertise: Dr. Arun Saroha (Neuro & Spine Surgeon)  |  Spine and Brain India

What Is Neurosurgery and What Does It Treat?

Neurosurgery is the surgical care of the nervous system — the brain, the spinal cord, the spine that protects it, and the nerves that branch out to the rest of the body. Contrary to popular belief, a neurosurgeon does not spend all day operating on the brain. In fact, a large part of the work involves the spine: treating slipped discs, pinched nerves, spinal canal narrowing, injuries and instability.

On the brain side, neurosurgeons treat conditions such as brain tumours, bleeding or clots after a stroke or injury, aneurysms (weak, ballooning spots in a blood vessel), hydrocephalus (excess fluid), and certain causes of epilepsy. It helps to think of the neurosurgeon as a highly specialised engineer working on the body’s most delicate wiring — where millimetres matter and every step is deliberate. Because these structures are so precious, the entire process is designed to be methodical, measured and, above all, safe.

Step 1: The Pre-Operative Work-Up — How Surgery Is Planned

Good neurosurgery is decided long before the patient enters the operating theatre. The most important work often happens in the clinic and the planning room. This preparation stage is where safety is truly built in, and it usually includes the following steps.

• Detailed history and neurological examination: The surgeon listens carefully to your symptoms and then tests your strength, sensation, reflexes, balance, vision and coordination. This examination often points to exactly which part of the brain, cord or nerve is affected.
• Advanced imaging (MRI and CT): An MRI shows soft tissues — the brain, spinal cord, discs and nerves — in fine detail, while a CT scan is excellent for bone and for detecting fresh bleeding. Sometimes special scans map blood vessels or the brain’s functional areas.
• Surgical planning: Using these scans, the surgeon plans the safest route to the problem, decides how much can be removed or repaired, and anticipates challenges — almost like rehearsing the operation in advance.
• Anaesthesia and fitness assessment: An anaesthetist reviews your heart, lungs, blood tests and medicines to make sure you are fit for surgery and to plan safe pain control. Blood thinners and certain drugs may need to be paused.
• Informed consent: The surgeon explains the diagnosis, the plan, the expected benefits and the possible risks in plain language, and answers your questions before you sign. This is your opportunity to understand everything and to feel comfortable moving forward.

By the time surgery is scheduled, the surgeon already has a clear roadmap. This careful groundwork is one of the biggest reasons neurosurgery is so much safer today than in the past.

Step 2: The Core Techniques — How the Surgery Is Actually Done

There is no single way to “do” neurosurgery. The technique is chosen to match the problem, and the guiding principle is always to achieve the goal through the smallest and safest possible access. Here are the main approaches a neurosurgeon uses.

• Craniotomy: The classic brain operation. A small piece of skull bone is temporarily removed to create a window to the brain, then replaced and secured with tiny plates and screws at the end. Through this window the surgeon can remove a tumour, clear a clot or repair an aneurysm.
• Minimally invasive and endoscopic surgery: Many procedures are now done through very small openings using an endoscope — a thin tube with a camera and light. Some brain and pituitary tumours are even reached through the nose, with no external cut at all. Smaller openings usually mean less pain and a quicker recovery.
• Awake craniotomy: When a lesion sits close to areas controlling speech or movement, the patient is kept comfortable but awake for part of the surgery. By talking or moving on request, they help the surgeon protect these vital functions while removing as much of the problem as possible.
• Microsurgery: Under a high-powered operating microscope, the surgeon works on structures thinner than a strand of hair — carefully separating a tumour from healthy tissue or protecting tiny blood vessels and nerves.
• Modern spine procedures: These range from microdiscectomy (removing the small fragment of a slipped disc pressing on a nerve) and decompression, to fusion and disc replacement, often performed through minimally invasive tubular or keyhole techniques.

Step 3: The Technology That Makes Neurosurgery Safer

If there is one thing that has transformed neurosurgery, it is the technology now available in a modern operating theatre. These tools do not replace the surgeon’s judgement and skill — they extend it, adding layers of precision and safety at every step.

• Neuronavigation (a GPS for the brain and spine): This system links the surgical instruments to your own scans in real time. Just as a car GPS shows your exact position on a map, neuronavigation shows the surgeon precisely where the instrument tip is in relation to your anatomy.
• The operating microscope: It magnifies the surgical field many times over and floods it with bright light, allowing the surgeon to see and preserve delicate nerves and vessels that are almost invisible to the naked eye.
• Intra-operative neuromonitoring (IONM): Sensors continuously monitor signals travelling through the nerves and spinal cord. If a pathway is under strain, the team is alerted immediately — acting like an early-warning system that helps prevent injury before it happens.
• Intra-operative imaging: In selected cases, live X-ray, ultrasound or scanning during the operation confirms that the goal has been achieved — for example, that a tumour has been adequately removed or an implant is perfectly placed — before closing.

Together, these technologies mean the surgeon is never working “blind.” They provide constant, real-time information that makes precise, tissue-sparing surgery possible.

Step 4: What Happens on the Day — Inside the Operating Theatre

Knowing the sequence of the day itself can take away much of the fear of the unknown. While details vary between operations, most neurosurgery follows a broadly similar rhythm from admission to the end of the procedure.

You will usually be admitted and asked to fast for a set number of hours beforehand. In the operating theatre, the anaesthetist gives you anaesthesia so you are pain-free — for most operations this means you are fully asleep, while for an awake craniotomy you are kept comfortable but responsive for part of the surgery. The team then positions you very precisely and, where needed, gently fixes the head or spine so nothing moves during the delicate steps.

The area is cleaned and draped in sterile fashion, and only a small, planned area of hair may be trimmed — not the whole head, as many people fear. The surgeon then makes the access (a craniotomy window or a small spinal opening), carries out the core work under the microscope with navigation and monitoring guiding every move, and confirms the result. Finally, the tissues are closed neatly in layers, any bone is fixed back in place, and a dressing is applied. Throughout, a full team — surgeon, anaesthetist, nurses and technicians — monitors your vital signs continuously.

Step 5: Recovery and Rehabilitation After Neurosurgery

Surgery is only half of the journey; recovery is the other half. What happens after the operation is just as carefully managed as the surgery itself, and it is tailored to the individual and the procedure performed.

Immediately afterwards, you are usually shifted to a recovery area and often to a high-dependency or intensive-care unit for close observation, especially after brain surgery. Nurses and doctors check your consciousness, movement, speech and vital signs regularly. Pain is controlled with medication, and the team watches carefully for any early problems so they can be addressed quickly.

Many patients are encouraged to sit up, take sips of water and even begin gentle walking sooner than they expect — early, guided movement helps prevent complications and speeds recovery. After many minimally invasive spine procedures, patients walk the same or next day and go home within a few days. Rehabilitation and physiotherapy are often central to regaining strength and confidence, and your surgeon will give you a personalised plan for wound care, activity and a gradual return to work and daily life.

The Surgeon’s Role: Why Experience Matters Most

With all this talk of technology, it is easy to forget the most important factor of all — the surgeon. Navigation systems, microscopes and monitors are powerful tools, but they are only as good as the hands and judgement guiding them. A skilled neurosurgeon decides whether surgery is even needed, chooses the safest approach, knows when to press on and when to stop, and handles the unexpected calmly.

This is why experience and training count for so much in neurosurgery. An expert such as Dr. Arun Saroha, with over 26 years of experience in neuro and spine surgery, brings the judgement that turns advanced technology into safe, successful outcomes. Practising at Max Hospital, Gurugram and Dwarka, he assesses each patient individually to decide whether a problem is best managed with observation, medication, physiotherapy or surgery — because the best operation is sometimes the one that is safely avoided.

Finally, a gentle reminder: this article is meant for general understanding and reassurance, not as a substitute for personal medical advice. Every brain and spine is unique, and the right answer for you can only come from a proper examination and discussion with a qualified specialist who has reviewed your scans and history.