Chapter 9 Part 2 Flashcards
Ex./Diag. opp. feet strike ground in unison-
Diagonal sequence. Ex: trot
Diag. seq.: Line between diag. points under center of mass-improves…
support
Diag. seq.: Can add third point of contact-
center of mass within “triangle”
Ex./Feet on same side move togeth./strike ground in unison-
Lateral seq. gait. Ex: pace
Latr. seq gait: Third foot can be in contact w/
substrate
Latr. seq gait: Center of mass is always within
triangle
Locomotion: alter. lateral movm. of vert. colmn. about pivot points estbl. w/
limbs. occurs in amph./rept.
Later tetrap.: Changed posture-
easier, more efficient limb swing
Crocs can draw limbs under
body for short bursts of fast movm.
Mamm.: Femur/humerus “twisted”-digits more in
line w/movm.
Acetabulum/glenoid fossa rotated
ventrally
Later tetra.: loss of ribs in posterior trunk-
greater flexibility of axial column
Incr. ease/effic. of limb movem.=active…
lifestyles
Cursorial: methods of incr. speed:
stride length/stride rate
Cursorial locom.: faster locom. coevolution of preds/prey, move betw…
resources
