Mindblown: a blog about philosophy.

The excessive use of a substance, especially alcohol or a drug. (There is no universally accepted definition of substance abuse.) A definition of substance abuse that is frequently cited is that in DSM-IV, the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM) issued by the American Psychiatric Association. The DSM-IV definition is as…

Abbreviation for subcutaneous. Subcutaneous means under the skin. It implies just under the skin. With a subcutaneous injection, a needle is inserted just under the skin. A drug (for example, insulin) can then be delivered into the subcutaneous tissues. After the injection, the drug moves into small blood vessels and the bloodstream. The subcutaneous route is…

Partial dislocation of a joint. A complete dislocation is a luxation.

Underneath the tongue. For example, a sublingual medication is a type of lozenge that is dissolved under the tongue.

Just beneath or underneath. The opposite of subjacent is superjacent. Other related terms include adjacent and circumjacent. From sub-, under + the Latin jacere, to lie = to lie under.

Bleeding into the space between the dura (the brain cover) and the brain itself. This space is called the subdural space. If the hematoma puts increased pressure on the brain, neurological abnormalities including slurred speech, impaired gait, and dizziness may result and progress to coma and even death. Subdural hematomas can be caused by minor accidents to the head, major trauma, or the spontaneous bursting…

Below the dura, the outermost, toughest, and most fibrous of the three membranes (meninges) covering the brain and the spinal cord. An subdural hematoma is a collection of blood beneath the dura.

Under the skin. For example, a subcutaneous injection is an injection in which a needle is inserted just under the skin. Also known as subcu. Abbreviated subq.

Abbreviation for subcutaneous. Subcutaneous means under the skin. It implies just under the skin. With a subcutaneous injection, a needle is inserted just under the skin. A drug (for example, insulin) can then be delivered into the subcutaneous tissues. After the injection, the drug moves into small blood vessels and the bloodstream. The subcutaneous route is…