The process of being aware that one is dreaming. Some researchers believe that in lucid dreaming, the individual may be able to change the outcome of the dream or control their degree of participation in the imaginary (dream) environment. Lucid dreams have been described as arising from either the sleeping or waking state. A number of ongoing studies are examining brain activity during sleep and dreaming to better characterize the phenomenon of lucid dreaming.
a landmark in the history of infectious disease.
1. Relating to syphilis, caused by it, or suffering from it. 2. A person with syphilis. From lues, an old name for syphilis.
Left upper lobe, the top-left lobe of the lung.
Referring to the five lumbar vertebrae, the disks below them, and the corresponding area of the lower back. The lumbar vertebrae and their disks are situated below the thoracic vertebrae and above the sacral vertebrae in the spinal column and are surrounded by soft tissues, including ligaments and large muscles.
- Lumbar puncture
A procedure in which cerebrospinal fluid is removed from the spinal canal for diagnostic testing or treatment. Abbreviated LP. The patient usually lies sideways for the procedure, although LPs in infants are often done upright. After local anesthesia is injected into the small of the back (the lumbar area), a needle is inserted between two […]