between self-image and how others see
treats neurosis by
changing a person's self-image.
self-injury The act of deliberately injur-
ing oneself. Self-mutilation most often
occurs in young adults, many of whom
are also drug or alcohol abusers, and is 3
times more common in women. It may
take the form of cutting the wrists or
burning the forearms with cigarettes. In
some, it is a means of dealing with stress,
such as that caused by child abuse.
More unusual forms of self-harm, such
as mutilating the genitals, are usually
is a feature of Lesch-Nyhan syndrome,
selegiline A drug used in the treatment
either alone (in
the disease's early stage) or with
Selegiline is also used to treat the
symptoms of parkinsonism due, for ex-
ample, to repeated head injury; it is not
used if the symptoms are drug-induced,
however. Side effects may include nau-
sea, vomiting, diarrhoea or constipation,
dry mouth, and sore throat.
semen Fluid produced by the male on
It is composed of fluid from
, fluid from the
and Cowper's glands, and
semen, blood in the A usually harmless
condition in which a small amount of
blood is present in the
ally, there is an underlying cause (such as
an infection or, very rarely, cancer) that
requires treatment. Blood in the semen
may also occur after a prostate
semicircular canal A structure in the
that plays a role in
There are 3 semicircular canals in each
ear, at right angles to each other, and
connected via a chamber called the
vestibule. The fluid-filled canals contain
small hairs that detect movement and
acceleration, and transmit information
to the brain via the vestibular nerve.
seminal fluid analysis Analysis of
sperm concentration, shape, and motility
(ability to move). It is used to investigate
and is also done some
to ensure that
the semen no longer contains sperm.
seminal vesicle One of a pair of sacs
that lie behind the bladder in the male
SEM INAL VESICLE
and produce seminal fluid, which is
mixed with sperm to make up semen
testis, cancer of.
senile dementia See
senile purpura A skin condition in which
areas of the skin develop a purplish or
reddish-brown appearance due to bleed-
ing of small blood vessels underneath.
Senile purpura is a disease of middle to
old age and is more common in women.
senility A term meaning old age or, more
commonly, the decline in mental ability
that may occur in old age.
obtained from the
leaves and pods of the Arabian shrubs
which stimulates bowel contractions.
It may colour the urine brown or red.
technique A method
taught to couples who are experiencing
sexual difficulties caused by psycholog-
ical rather than physiological factors. The
aim of the technique is to make both
partners more aware of pleasurable
bodily sensations, and to reduce anxi-
ety about performance. It is particularly
effective in treating loss of sexual desire
sexual desire, inhibited
), or inability
to achieve orgasm (see
orgasm, lack of
and in helping men to overcome
or premature ejaculation (see
ejaculation, disorders of
sensation A feeling or impression that
has entered consciousness. The senses
convey information, about the external