Fingerprint Flashcards

1
Q

This refers to the
points of the tails in the formation of the pattern.

A

Ridge Characteristics

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2
Q

Is a kind
of ridge formation that curves
back in the direction from which it started. Sometimes referred as looping ridge.

A

RECURVING RIDGE

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3
Q

Are two ridges running side by side and suddenly separating, one ridge going one way and the other ridge going another way.

A

DIVERGING RIDGE-

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4
Q

Is a single ridge which splits into two ridges forming a Y shape structure.

A

BIFURCATION OR
BIFURCATING RIDGE

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5
Q

Two or more lines forming an angle.A ridge whose close end is
angular and serve as a point of
convergence pointed and
abrupt.

A

CONVERGING RIDGE -

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6
Q

The point at which one ridge
divides into three ridges

A

Trifurcation

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7
Q

A single friction ridge that
terminates within the
friction ridge structure.

A

ENDING RIDGE

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8
Q

A point where two ridge units
intersect.

A

Ridge Crossing

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9
Q

A short ridge on top or summit
of a recurving ridge usually at
right angle.

A

APPENDAGE

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10
Q

Is a single ridge in the center of a recurving ridge of a loop pattern.

A

ROD OR BAR

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11
Q

a single recurving ridge enclosing one or more rods or bars.

A

ENVELOP

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12
Q

Is a
bifurcation which does not
remain open but which the leg of the bifurcation, after running along side by side for a short
distance, came together again
to form a single ridge once
more.

A

ENCLOSURE

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13
Q

Fragmentary ridges formed by a dot or series of dots, which
resembles appoint.

A

Dot or series of dots

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14
Q

bifurcation with one
short ridge branching off a
longer ridge

A

Spurs

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15
Q

Fragmentary ridges formed by short or series of short ridges.

A

SHORT or SERIES OF SHORT RIDGES

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16
Q

connecting friction ridge
between parallel running ridges,
generally right angles.

A

BRIDGES

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17
Q

Is a part of fingerprint which lies within the area surrounded by the type
lines.

A

PATTERN AREA

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18
Q

These are basic boundaries of all fingerprint
patterns. They are formed with ridges which run parallel, then diverge or separate tending to surround the pattern area.

19
Q

unusual type of ridges found in small percentage of patterns; short,
narrow and badly formed ridges found between two well-formed and full-bodied ridges.

A

Incipient ridges -

20
Q

depressions or canals between
the ridges, which maybe
compared with the low area in a
tire thread.

21
Q

is that point on a ridge at or nearest the point of divergence of two typelines, and located at or
directly in front of the point of
divergence.

22
Q

The approximate center of the upon or within the innermost sufficient recurve. It may be located on the shoulders of the innermost loop farthest from the delta.

23
Q

is that point on a ridge at or nearest the point of divergence of two typelines, and located at or
directly in front of the point of
divergence.

24
Q

Rules governing the selection of delta

A

Rule 1
The delta may not be located at a bifurcation which does not open toward the core.

Rule 2
When there is a choice between a
bifurcation and another type of delta,
the bifurcation is selected.

Rule 3
When there are two or more possible
deltas which conform to the
definition, the
one nearest the core is
chosen.

Rule 4
The delta may not be located
in the middle of a ridge running between the type lines toward the core, but at the nearer end only.

25
It refers to the approximate center of the finger impression.
Core
26
Rules governing the Selection of Core
Rule 1 The core is placed upon or within the innermost sufficient recurve. Rule 2 When the innermost sufficient recurve contains no ending ridge or rod rising as high as the shoulders of the loop, the core is placed on the shoulder of the loop farther from the delta. Rule 3 When the innermost sufficient recurve contains an uneven number of rods rising as high as the shoulders, the core is placed upon the end of the center rod whether it touches the looping ridge or not. Rule 4 When the innermost sufficient recurve contains an even number of rods rising as high as the shoulders, the core is placed upon the end of the farther one of the two center rods, the two center rods being treated as though they were connected by a recurving ridge.
27
refers to the naming one fingerprint pattern.
pattern interpretation
28
the fingerprint pattern in which the ridges enter on one side of the impression then flow out on the other side with a rise or wave in the center.
Plain arch
29
fingerprint pattern in which most of the ridges enter upon one side of the impression and flow out upon the other side, as in plain arch type, however, the ridge or ridges at the center do not.
Tented arch
30
Arch frequency
Tented arch - 40% Plain arch - 60%
31
The pattern in which one or more of the ridges enter on either side of the impression, recurve, touch or pass upon an imaginary line drawn from the delta to the core and terminate tend to terminate in or toward the same side of the impression from where such ridge or ridges enter.
Loops
32
Requisites of a loop pattern:
It must have a delta and a core it must have ridge count of at least one; it must have a sufficient recurve or recurving ridges that passes an imaginary line between the delta and the core.
33
The process of counting the ridges intervening between the delta and the core.Neither the delta nor the core is counted when an imaginaryline is drawn connecting them.
RIDGE COUNTING
34
derived its name from the radius bone of the forearm; √ it is a type of pattern in which the ridges run its direction towards the radius bone or thumb.
Radial loop
35
type of pattern in which the ridges flow toward the ulna bone or little finger.
Ulnar Loop
36
Loop frequency
Radial - 6% Ulnar - 94%
37
simplest form whorl construction and is the most common of all types of whorl.
Plain whorl
38
√ It is a fingerprint pattern, which has two deltas and at least one ridge making a complete circuit in the form of a spiral, oval, circular or any variant of a circle MUST touch or cross the imaginary between the two deltas. line drawn
Plain whorl
39
A fingerprint pattern, which has two deltas and at least NO ridge making a complete circuit, which may be spiral, oval, circular or any variant of a circle DO NOTtouch or cross the imaginary line connecting the two deltas.
Central Pocket loop whorl
40
It is called a composite or transitional pattern because it is made up of two patterns in one, a whorl inside a loop
Central Pocket loop whorl
41
Consist of two separate and distinct loop formations. with two sets of shoulders and two deltas.
Double loop whorl
42
One of the loops surrounds or overlaps the other and also called composite pattern, like the central pocket loop whorl.
Double loop whorl
43
It is a pattern consisting of a combination of two or more different types of pattern.
Accidental Loop Whorl
44
When the deltas have been located, the ridge emanating from the lower side or point of the extreme left delta is traced until the point nearest or opposite the extreme right delta is reached. The number of ridgesintervening between the tracing ridge and the right delta are then counted.
Whorl tracing