Conceptual Images. Imagery from internal sources (the
"mind's eye") rather than from external, perceived
sources; usually simplified images; often abstract rather
than realistic.
Contour Line. In drawing, a line that represents the shared
edges of a form, a group of forms, or forms and spaces.
Corpus Callosum. A massive, compact bundle of axons con-
necting the right and left cerebral cortices. The corpus
callosum allows the two halves, or hemispheres, of the
cerebral cortex to communicate directly with one
another.
Creativity. The ability to find new solutions to a problem or
new modes of expression; the bringing into existence of
something new to the individual and to the culture.
Writer Arthur Koestler added the requirement that the
new creation should be socially useful.
Crosshatching. A series of intersecting sets of parallel lines
used to indicate shading or volume in a drawing.
Edge. In drawing, the place where two things meet (for
example, where the sky meets the ground); the line of
separation between two shapes or a space and a shape.
Expressive Quality. The slight individual differences in the
way each of us perceives and represents our perceptions
in a work of art. These differences express an individ-
ual's inner reactions to the perceived stimulus as well as
the unique "touch" arising from individual physiological
motor differences.
Eye Level, In perspective drawing, a horizontal line on
which lines above and below it in the horizontal plane
appear to converge. In portrait drawing, the propor-
tional line that divides the head in half horizontally; the
location of the eyes at this halfway mark on the head.
Foreshortening. A way to portray forms on a two-dimen-
sional surface so that they appear to project from or
recede behind a flat surface; a means of creating the illu-
sion of spatial depth in figures or forms.
Format. The particular shape of a drawing or painting sur-
face—rectangular, circular, triangular, etc.; the propor-
tion of the surface, e.g., the relationship of the length to
the width in a rectangular surface.
Grid. Evenly spaced lines, running horizontally and verti-
cally at right angles, that divide a drawing or painting
into small squares or rectangles. Often used to enlarge a
drawing or to aid in seeing spatial relationships.
Hemispheric Lateralization. The differentiation of the two
cerebral hemispheres with respect to function and mode
of cognition.
Holistic. In terms of cognitive functions, the simultaneous
processing of an array of information in a total configu-
ration as opposed to sequential processing of its sepa-
rate parts.
Image. Verb: to call up in the mind a mental copy of some-
thing not present to the senses; see in the "mind's eye."
Noun: a retinal image; the optical image of external
objects received by the visual system and interpreted by
the brain.
Imagination. A recombination of mental images from past
experiences into a new pattern.
Intuition. Direct and apparently unmediated knowledge; a
judgment, meaning, or idea that occurs to a person
without any known process of reflective thinking. The
judgment is often reached as a result of minimal cues
and seems to "come from nowhere."
Key. In drawing, the lightness or darkness of an image. A
high-key drawing is light or pale in value; a low-key
drawing is dark or low in value.
Learning. Any relatively permanent change in behavior as a
result of experience or practice.
Left Hemisphere. The left half (oriented according to your
left) of the cerebrum. For most right-handed individuals
and a large proportion of left-handed individuals, verbal
functions are in the left hemisphere.
L-Mode. A state of information processing characterized as
linear, verbal, analytic, and logical.
Negative Spaces. The areas around positive forms that share
edges with the forms. Negative spaces are bounded by
the outer edges by the format. "Interior" negative spaces
canbepartof positive forms: For example, the whites of
the eyes can be regarded as interior negative spaces use-
ful for drawing the irises.
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THE NEW DRAWING ON THE RIGHT SIDE OF THE BRAIN