Stuart S. - PowerPoint Presentation

Stuart S.
Stuart S.

Stuart S. - Description


Sumida Kathleen Devlin Biology 342 Locomotion Mammalian Walking SYMMETRICAL GAITS Gaits are said to be SYMMETRICAL when the foot falls of two feet of any given pair are evenly spaced in time ID: 571031 Download Presentation

Tags

walking walk feet amble walk walking amble feet hind gaits left front mammalian high standard ground support point trot

Embed / Share - Stuart S.


Presentation on theme: "Stuart S."— Presentation transcript


Slide1

Stuart S. Sumida / Kathleen DevlinBiology 342Locomotion: Mammalian WalkingSlide2

SYMMETRICAL GAITS:Gaits are said to be SYMMETRICAL when the foot falls of two feet of any given pair are evenly spaced in time.Generally, natural symmetrical gaits are associated with slower speeds and when at least one or more of the four feet are on the ground at any given moment. Slide3

PaceLateral Trot

(Normal = “Diagonal” Trot

WalkSlide4
Slide5

ASYMMETRICAL GAITS:Gaits are said to be ASYMMETRICAL when the foot falls of two feet of any given pair are unevenly spaced in time.Generally, asymmetrical gaits increase the length of stride by introducing periods of suspension when all feet are off the ground.Slide6
Slide7
Slide8

STANDARD MAMMALIAN WALKINGIn four-legged mammals, a walk is usually characterized by having some stage of the step-cycle including a three-point under support – or triangular under support. In other words, at some point three feet are touching the ground. (Human walking is when right and left feet are both in contact at the same time during some part of the step-cycle.)

Walking is considered the slowest of the

quadrupedal

gaits.

The standard mammalian walk is remarkably consistent from species to species – from mouse to mammoth: footfall sequence in order: Right Hind, Right Front, Left Hind, Left Front; Repeat.Slide9

RH

LH

LF

RF

Left Hind Left Front

Right Hind Right Front

CONVENTIONSSlide10

NORMAL/STANDARD WALKThe standard mammalian walk is remarkably consistent from species to species – footfall sequence in order: Right Hind, Right Front, Left Hind, Left Front; Repeat. In four-legged mammals, a walk is usually characterized by having some stage of the step-cycle including a three-point under support – or triangular under support. In other words, at some point three feet are touching the ground. Slide11
Slide12
Slide13

LH

LH

LH

LH

LH

RH

RH

RH

RH

RH

LF

LF

LF

LF

LF

STANDARD MAMMALIAN QUADRUPEDAL WALK

RF

RF

RF

RF

RFSlide14
Slide15

In walking, canine scapula:

Angles forward almost 40-45 degrees;

Comes close to perpendicular to ground at greatest posterior excursion;

Dorsal tip remains approximately fixed.Slide16

THE AMBLEThe AMBLE is essentially a “sped-up” walk. It is a gait that is usually transitional between a normal walk and a trot.

This sped up walk is what animals do when constrained to walking but when they want to move

fast.

This sped up walk is what animals do when they are very large (e.g. elephants) and can’t truly trot.Slide17

LH

LH

LH

LH

RH

RH

RH

RH

LF

LF

LF

LF

THE AMBLE

RF

RF

RF

RF

RH

RF

LF

LFSlide18

THE HIGH LEAD AMBLEThe HIGH LEAD AMBLE is more common in large animals (e.g. horses, but is occasionally seen in medium to larger dogs)The walking gait is still a succession of hind-font couplets that alternate sides, but done at a higher speed – a high enough speed so that the animal doesn’t

tip from one side to the other.

This gait has only a very brief and smaller triangular under support.Slide19

LH

LH

RH

RH

RH

LF

LF

LF

THE HIGH LEAD AMBLE

RF

RF

RF

RH

RH

LH

LH

LHSlide20

High Lead Amble

Shom More....
calandra-battersby
By: calandra-battersby
Views: 45
Type: Public

Download Section

Please download the presentation from below link :


Download Presentation - The PPT/PDF document "Stuart S." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.

Try DocSlides online tool for compressing your PDF Files Try Now