| somesthetic area | Somatosensory cortex, the region of the cerebral cortex receiving the somatic sensory radiation from the ventrobasal nucleus of the thalamus; it represents the primary cortical processing mechanism for sensory information originating at the body surfaces (touch) and in deeper tissues such as muscle, tendons, and joint capsules (position sense); it corresponds approximately to Brodmann's areas 1, 2, 3 on the postcentral gyrus. Synonym: somesthetic area. (05 Mar 2000) |
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| somesthetic system | Sensory data derived from skin, muscles, and body organs in contrast to that derived from the five special senses. (05 Mar 2000) |
| somewhat poorly drained soil | <botany> A condition in which water is removed slowly enough that the soil is wet for significant periods during the growing season. (04 Mar 1998) |
| somilase | <enzyme> Russian tablet, contains solizyme and amylase Registry number: EC 3.- (26 Jun 1999) |
| somite | 1. <zoology> One of the actual or ideal serial segments of which an animal, especially. An articulate or vertebrate, is is composed; somatome; metamere. Somitic. 2. <embryology> Segmentally arranged blocks of mesoderm lying on either side of the notochord and neural tube during development of the vertebrate embryo. Somites are formed sequentially, starting at the head. Each somite will give rise to muscle from the myotome region), spinal column (from the sclerotome) and dermis (from dermatome). (04 Mar 1998) |
| somite cavity | 1. Protrusion of muscle substance through a rent in its sheath. Origin: myo-+ G. Kele, hernia 2. The small cavity that appears in somites. Synonym: somite cavity. Origin: myo-+ G. Koilia, a cavity (05 Mar 2000) |
| somites | The paired, blocklike masses of mesoderm, arranged segmentally alongside the neural tube of the embryo, forming the vertebral column and segmental musculature. (12 Dec 1998) |
| somitic mesoderm | Mesoderm derived from cells situated in or derived from somites. (05 Mar 2000) |
| somnambulance | <psychiatry, neurology> Sleepwalking, rising out of bed and walking about during an apparent state of sleep, usually occurring in the first third of the night and lasting a few minutes to a half hour. Origin: L. Somnus = sleep, ambulare = to walk (18 Nov 1997) |
| somnambulic epilepsy | Postictal automatism in which the patient walks or runs about exhibiting natural behaviour of which he or she has no subsequent remembrance. (05 Mar 2000) |
| somnambulism | <psychiatry, neurology> Sleepwalking, rising out of bed and walking about during an apparent state of sleep, usually occurring in the first third of the night and lasting a few minutes to a half hour. Origin: L. Somnus = sleep, ambulare = to walk (18 Nov 1997) |
| somnambulist | One who is subject to somnambulism. Synonym: sleepwalker. (05 Mar 2000) |
| somnambulistic trance | A state of somnambulism, paralysis, anaesthesia, or catalepsy induced by suggestion in major hypnosis. (05 Mar 2000) |
| somnifacient | Synonym: soporific. Origin: L. Somnus, sleep, + facio, to make (05 Mar 2000) |
| somniferous | Synonym: soporific. Origin: L. Somnus, sleep, + fero, to bring (05 Mar 2000) |