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verts exam 2

QuestionAnswer
cranial kinesis movement within the skull
cranial akinesis no movement within the skull
metakinesis hinge passes across the back of the skill permitting rotation between the neurocranium and outer dermatocranium
prokinesis joint passes through the dermatocranium behind eye
monokinetic one joint
dikinetic two joints
streptostyly quadrate is free to undergo some degree of independent rotation about its dorsal connection within the braincase
paleostyly none of the arches are attached directly to the skull
euautostylic mandibular arch is suspended from the skull by itself without help from the hyoid arch
amphistylic jaws attach to braincase through two primary articulations, anteriorly by a ligament connecting hte palatoquadrate to the skull and posteriorly by the hyomandibula
hyostylic mandibular arch is attached to the braincase primarly through the hyomandibula
metautostylic jaws attached to braincase directly through the quadrate
craniostylic entire upperjaw is incorporated into braincase, lower jaw is suspended from the dermal squamosal bone in the braincase
rhachitomous (aspidospondyly) all elements separated
lepospondyl (holospondyl) all elements fused
acoelous flat at both ends; recieve and distribute forces within vertebral column
amphicoelous concave around notochord; allow limited motion in most directions
procoelous one end flat, other end concave; extensive motion in most directions without stretching nervechord
opisthocoelous
Created by: lmunoz
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