Herniated nucleus pulposus (HNP) in the lumbar spine is another name for a herniated disc in the lower back, which can lead to chronic lower back pain and sciatica. HNP occurs when a disc in the spine is compressed under the constant pressure of the surrounding vertebrae.

2025年3月5日 · Lumbar Disc Herniation is a very common cause of low back pain and unilateral leg pain, known as radiculopathy. In rare cases a large disc herniation can lead to Cauda Equina Syndrome which requires emergent diagnosis and treatment. Diagnosis is made clinically and confirmed with an MRI studies of the lumbar spine.

2023年8月7日 · This activity describes the etiology, epidemiology, clinical presentation and treatment of a nucleus pulposus herniation, which is a condition characterized by a rupture of the annulus fibrosus with a displacement of the nucleus pulposus outside the intervertebral disc space causing symptoms derived from inflammation and compression of nerve roo...

2023年6月30日 · The symptoms due to herniated nucleus pulposus (HNP) can ultimately be attributed to the significant inflammatory response it generates inside the spinal canal. Disk injury results in an...

When compared to other regions, the lumbar region is where disc herniation is most commonly observed, especially at the L4-L5 and L5-S1 levels [5]. Lumbar disc herniation associated with radiculopathy (LDHR) is the outcome of the extruded disc material pressing into or contacting the lumbar nerve roots.

2024年11月3日 · Essential for HNP. Positive if pain radiates down the leg at 30-60 degrees of hip flexion. A classic sign for lumbar disc herniation, especially involving L5 or S1 roots. Crossed Straight Leg Raise (Contralateral SLR): Pain induced in the symptomatic leg when the opposite leg is raised suggests severe HNP. Lasegue Maneuver (foot dorsiflexion test):

1993年12月1日 · The acute lumbar herniated nucleus pulposus (HNP), can often be diagnosed on good quality MRI or CT examination. Myelography, discography, and postmyelography/postdiscography CT ordinarily are reserved for equivocal and protracted cases.

HNP frequently occurs between L5-S1 or the fourth and fifth lumbar vertebrae. Causes of HNP include natural degeneration, spine trauma, and spinal stenosis. Assessment findings include radiating pain, lower extremity weakness, and bowel/bladder incontinence.

2019年6月10日 · Herniated nucleus pulposus or HNP is a medical term used to define a spinal condition commonly known as slipped disc or herniated disc. Herniated nucleus pulposus does not give rise to symptoms by itself. Symptoms are felt, when the leakage of nucleus causes compression of nerves, which in turn leads to other serious issues.

Let's look at what a herniated disc really is, how it causes problems, and how the condition is diagnosed and treated by a back specialist. To better understand how a herniated disc occurs, it is helpful to know some anatomy of the spine and more specifically, the parts of the spine involved. Please review the document entitled: