Dr. Yannick Grenier practices Neurological Surgery in Cincinnati, Ohio. As a Neurological Surgeon, Dr. Grenier prevents, diagnoses, evaluates, and treats disorders of the peripheral and central nervous systems. Neurological Surgeons are trained to treat such disorders as spinal canal stenosis, herniated discs, tumors, fractures, and spinal deformities, among many others.She has completed a fellowship in movement disorders for deep brain stimulation and pain neurosurgical interventions at Sanford University in 2001 and is interested in the multidisciplinary neuromodulation programs for treatment of chronic pain.
Education and Training
Pritzker School of Medicine MD 1993
American Board of Neurological Surgery
yannick grenier's Expert Contributions
Seven questions to ask yourself or to ask your patient to answer before implantation of a spinal cord stimulator for chronic pain
Questions yes/no1. Can I state in simple terms how the stimulation works?2. Am I able to operate the remote for the stimulator safely?3. Do I and my family have the resources to take care of the wounds at home, go to follow up appointments and reprogramming sessions as needed for optimal therapy?4....
Yes, both problems can happen at the same time. The neuropathy is a nerve "neuro" pathology "pathy." The slipped disc is a degenerative spine problem when a disc component is compressing a nerve root in the canal or in the space to exit the spinal canal. Causes of neuropathy are sometimes metabolic (diabetes, thyroid problems) or inflammatory (from autoimmune antibodies). An EMG/NCV can determine of only one nerve is involved or if the neuropathy is affecting multiple nerves. The CT or MRI of the lumbar spine can show the degenerative disc disease. READ MORE
Yes, the memory can be evaluated formally with neuropsychological testing once the epilepsy is managed as best as possible with medications. READ MORE
The risks and benefits of surgery should be explained by your surgeon and should be clear before surgery is scheduled. If not more opinions may be necessary to clarify the risks of surgery and alternatives to surgery. READ MORE
Myelin is the insulation of the nerves, it allows nerve conduction and populations of cells to talk to each other. Myelin development during the first years of life shapes the pathways and connections that support function. There can be many different causes of delay of myelination. Making the diagnosis if possible is the next step. READ MORE
No. The first step is to have a neurologic exam and imaging of the vestibular system with a brain MRI with and without contrast if possible. There are medical and rehab treatments that can be offered after the diagnosis is obtained. READ MORE
Pituitary adenomas are most often benign, but their secretion, if any, as well as mass effect on the optic apparatus need to be evaluated. READ MORE
We usually follow radiologically whether the tumor is removed or not, but if it is removed, we can look at the tumor microenvironment, genetic makeup, and start asking this question. If it does not change over time and it is small, there is no need to do this. READ MORE
The usual surgical treatment for spinal stenosis is to decompress by the nerves with or without a fusion. READ MORE
Physical therapy, spinal injections, spinal decompression, and fusion surgeries can be offered. READ MORE
Yes, most implants in the past decade are MRI compatible, but the exact implants will be checked before the MRI is performed to make sure that they are MRI compatible. READ MORE
Feeling does not identify the cause of the pain, imaging does. READ MORE
PT and a regular exercise schedule is useful for core strengthening at the very least but this has be discussed with your surgeon. READ MORE
Yes. READ MORE
The vestibular system includes the middle ear and the nerves as well as the tracts in the brainstem. MRI with and without contrast helps to know if the anatomy is normal. READ MORE
Spine specialists can be from an orthopedic or neurosurgery training program. READ MORE
Treatment for a disc herniation can vary based on the effect on the spinal cord or on the spinal roots that are affected by the herniation. In general neurologic problems such as numbness, weakness, balance, tone or bladder problems need to be monitored if present READ MORE
This is a neurodegenerative disease. The management of the disease makes a difference in the quality of life of the patients but there is no easy treatment to address the cause of the degeneration. READ MORE
You should consult with a neurologist but yes a migraine can cause temporary motor speech problems. READ MORE
The first step is to see a psychologist; they can test your memory and give you more information. READ MORE
There is substantial research on the blood flow and vessel architecture changes as well as the genetic predispositions that can cause aneurysm formation. You can discuss this with the treating physician. READ MORE
A good physical exam can determine if your strength, sensation, tone and reflexes are affected or if this is a muscular problem. Then imaging or emg testing can be done. READ MORE
It is not clear what causes eye twitching but some medications and stressors can make them worse READ MORE
Neurologists are trained to examine and diagnose the causes of migraines, you should go see one READ MORE
Infections are just one cause of abnormal eye movements, metabolic or inflammatory problems also need to be ruled out READ MORE
Yes there are surgeries for chronic pain but you need to make sure no infection or instability needs to be addressed first. READ MORE
The decision is based on the risk of growth and the location of the mass. If it can be monitored then the decision is to choose how often the scans have to be done. READ MORE
The first step is usually physical therapy, and xrays or mri READ MORE
The treatment will vary on the cause, a biopsy may be helpful READ MORE
Yes most epilepsy centers can offer surgical and medical therapies for medically refractory epilepsy READ MORE
A neurology evaluation is needed READ MORE
The doctors will follow the evolution of the curve of the head circumference and corrolate with his growth and his behavior as well as with imaging with ultrasound, ct or mri READ MORE
Yes READ MORE
Radiation affects the DNA of the cells that are growing. The treatment can change the behavior of tumors especially if they are fast growing. The complications from radiation are often delayed and I am sure that they were discussed with you. READ MORE
Our immune system is well equipped to react to viral infections, so supportive care with iv fluids, correction of electrolyte abnormality and rehab is often helpful. READ MORE
Yes, balance and vision problems are best evaluated by the doctor. READ MORE
The radiologist can see MS lesions on the MRI but cannot directly see Alzheimer lesions. No worries there. READ MORE
The CT is helpful but mostly shows calcification and bone details, MRI is more expansive but shows better tumor and brain or nerve details. READ MORE
The American Association of Neurological Surgery or AANS is a great resource for information on brain tumors. The symptoms will vary in accordance to the networks involved and the effect on blood vessels and conduction changes due to the tumor. Some infiltrate the brain and some do not. READ MORE
Neuromodulation is using electrical stimulation to affect a functional network in the brain. No it is a modulation not a cure so far but it can help in addition to other tools like exercise and medication READ MORE
This is a very sad and difficult situation. Encephalopathy is when the brain activity is abnormal and a person is declared dead if brain activity both metabolic and electrical is absent. The goal of choosing a care plan is to respect the wishes of the sick person if that person had to make decisions. READ MORE
Mood changes are expected after a traumatic brain injury. A structured rehab program is helpful. A psychiatrist will treat with medications but a psychologist can help adjust goals and plans to help you cope with the changes that have happened. READ MORE
MRI stands for magnetic resonance imaging. It involves radiofrequency waves, but no ionizing radiation like X-rays or CT do. The RF waves are safe for children, but make a lot of noise. READ MORE
In general seizures, heart problems or vestibular problems can cause these symptoms but medications and metabolic problems can also READ MORE
Awake surgery can be done safely if necessary to test for speech or movement during the case. READ MORE
Nerves are living conduits of electrical impulses. Neuropathy means the nerves do not conduct the electrical signal well. The causes of neuropathy include metabolic diseases like diabetes. The treatment of the pain includes medications to decrease the abnormal firing of the impaired nerves like gabapentin. A low dose is better than a high dose because the side effects especially sedation are lower with a lower dose. READ MORE
It is a failure of the reticular activating system to activate the thalamus or cortex. Hence, the brainstem reflexes can be present, but not cortical function. READ MORE
The approach to treating ADHD is usually medical and involves behavioral neurology/psychology/psychiatry/education teams. The last resort for malignant ADHD that has failed medical management can involve surgery if the ADHD is associated with disabling tics or extreme aggression. It is not common and really should be done on a research protocol. READ MORE
The way it usually works is for the seizure work up to try to identify the electrical source of the seizure. This is initiated by the treating neurologist and can be quite extensive if the seizures are not controlled by medications alone. READ MORE
Deep brain stimulation is FDA approved for PD but not usually offered as a neuroprotective treatment. Genetic testing is available in specialized clinics. READ MORE
Yes, your pain specialist can explain the medications and surgeries that can decrease the pain. It is important to treat the pain to prevent a "wind up" and maximize the functional use of the leg. READ MORE
There can be, and the work up include imaging the head and neck as well as the lumbosacral spine with MRI. If the headaches worsen when you get up from laying down, they are called postural and could be due to low pressure in the spinal canal. If the headaches are worse when you lay down and are associated with arm pain, they could be related to the cervical spine. READ MORE
It would be best to see your neurologist soon for examination and imaging READ MORE
Yes, fatigue is normal when the brain is healing, but you should address your treatment team with this question as medications, fluid shifts, and lack of sleep may affect her recovery. READ MORE
Be patient with yourself and pace your activity in agreement with your care team recommendations. READ MORE
My wife had surgery for removal of a brain tumor and six months later is again feeling dizzy. What could be wrong?
Please address this question with your care team, but in general, medications (titration of anti epileptic medication), autonomic problems, cardiovascular issues and vestibular problems can all contribute to lightheadedness. READ MORE
Please address this question to your care team. Yes blood thinners can work, but the extent of the clot, your anatomy, hydration status and genetic background can affect how well they can work. READ MORE
Please discuss this with your care team. A skull fracture should heal within 12 weeks but healing is a process. It can be followed with imaging (CT) READ MORE
Please address your concerns with the care team. Very often speech pathologists continue working with the patient after discharge from acute care. READ MORE
Please address this question with your care team. Meningiomas can cause mass effects on other structures. Yes, the mass effect can cause health risks. These risks are compared to the risks of the proposed interventions. In general, the risks increase with larger tumors. READ MORE
Please address this question with your doctor as your preparation will depend on your pathology. In general it is better not to smoke and to discuss your general health with your PCP. READ MORE
Please address this question to your treatment team. Pain does not cause paralysis but does affect your ability to participate in therapeutic exercises. If the pain is mechanical, that is increases in certain positions, discuss alternatives with your therapist to avoid worsening the pain and the problem in your back. Being sedentary, that is spending a lot of time sitting, can be a cause of pain as well. READ MORE
Areas of expertise and specialization
- Best doctor in Medicine 2018 National Health Institute
Charities and Philanthropic Endeavors
- Essential tremor foundation, Halifax hospital foundation
- Bethesda North Hospital ( Cincinnati, OH )
yannick grenier's Practice location
Cincinnati, Ohio 45212Get Direction
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