Yes, that's right.
A needle is inserted, usually between L4 and L5 (the fourth and fifth lumbar vertebrae), into the epidural space (below the level of the spinal cord), withdrawing spinal fluid for diagnostic purposes.
A "spinal tap" is also known as a "lumbar puncture".Lumbar puncture
a spinal tap, or lumbar puncture
The lumbar thecal sac is a membrane that surrounds the spinal cord. It is filled with cerebral spinal fluid. It is in the lower back.
spinal tap ....also known as lumbar puncture
Lumbar spinal tap
The spinal cord is protected by the vertebrae, meninges, and CSF (cerebrospinal fluid)
A spinal tap is generally done between the first and second or second and thrid lumbar vertebrae. A needle is inserted using a local anesthetic, the spinal fluid prssure is measured. A small amount of fluid is removed and examined for blood, bacteria, protein, etc. Cultures are usually also done to check for infection.
The spinal cord is protected by the vertebral column or spinal column. The vertebral column is a collection of individual bones called vertebrae that encase and protect the spinal cord. The vertebral column is divided into three parts: seven cervical (neck) vertebrae at the top, twelve thoracic vertebrae in the mid back, and five lumbar vertebrae in the lower back. Below the lumbar vertebrae, but not protecting the spinal cord, are the sacrum and coccyx (tailbone)
5 ml
I doubt there would be NO fluid in the spinal cord, but very often physicians cannot tap the spinal cord to obtain fluid, sometimes, they just cannot get in. In cases like this, they will often send the person to radiology for a CT assisted lumbar puncture There is a condition called dry tap, that is when no fluid drained out while lumbar puncture is performed. Fluid thickening due to inflammatory process (called arachnoiditis) may be one of its causes (because it thickens, it cannot pass the syringe)
It's the same. Two terms used for one procedure. Or we may say that lumbar puncture is a spinal tap that is done in lumbar area, while spinal tap can also be performed right below the occipital bone (called suboccipital puncture). All in all it's a procedure to obtain the fluid that surrounds the brain and spinal cord.