Additional images. 1  Dura mater (spinal section) 2  Diagrammatic representation of a section across the top of the skull, showing the membranes of the brain, etc. 3  Diagrammatic transverse section of the medulla spinalis and its membranes. 4  Spinal cord. Spinal membranes and nerve roots.Deep dissection. 5  Spinal cord.
exists and is an alternate of . Amateur is a term that describes work done by nonprofessionals. <i>Amateur</i> is a term that describes work done by nonprofessionals.
The term substantial gainful activity is used to describe a level of work activity and earnings. Work is substantial if it involves doing significant physical or mental activities, or a combination of both. Gainful work activity is either of the following: Work performed for pay or profit;