(1) Although most studies emphasise the similarity of the australopithecines to modern man, and suggest, therefore, that these creatures were bipedal tool-makers at least one form of which (Australopithecus africanus--"Homo habilis", "Homo africanus") was almost directly ancestral to man, a series of multivariate statistical studies of various postcranial fragments suggests other conclusions.
(2) The exoskeleton is fitted with multiple gyros to stop it falling over during the balancing act of bipedal walking.
(3) Bipedality may have arisen more than once, the Australopithecinae displaying one or more experiments in bipedality that failed.
(4) Rather, it appears that the development of the LSA is related to the progressive acquisition of erect posture and the ontogeny of bipedal locomotion.
(5) Our studies on the gluteal (Tuttle et al., '78) and thigh muscles of African apes partly confirm Kummer's ('75) prediction that considerable gluteal and hamstring activity would be required in order for them to stand bipedally with flexed hip and knee joints.
(6) From a comparative biomechanical standpoint, it would appear that modern man's ancestors have possessed upright posture and bipedalism for 12 to 14 million years.
(7) Bipedal lymphangiography, in our experience, was no more accurate than excretory urograms in selecting patients with retroperitoneal disease and in addition provides no information regarding the status of the upper urinary tract.
(8) Consequently their bipedal stride lengths do not appear to be exceptional in length when compared to other mammals.
(9) The opposite was observed in adult dogs, where bipedalism was shown to be much more energy-consuming than quadrupedalism.
(10) On the basis of theoretical biomechanics and of experiments, we investigated the mechanical requirements to which the body of a bipedally walking primate is subject, and the possibilities to meet these requirements with a minimum amount of energy.
(11) Specifically, for the same direction of platform movement, during bipedal stance muscles on one side of the lower limb were activated in a distal to proximal sequence; during quadrupedal stance, muscles on the opposite side of the lower limb were activated and in a proximal to distal sequence.
(12) Human children, at the transitional stage between quadrupedalism and bipedalism, have high and almost equal requirements for all postures and locomotions.
(13) In the course of bipedal lymphography, the right axillary nodes were filled with contrast medium from the right pelvic region via the subcutaneous lymphatics.
(14) This model was selected among the postural behaviours that were roughly antecedent to Hominidae bipedalism.
(15) Bipedalism is relatively rare but nevertheless occurs in a wide variety of situations, although bipedalism during feeding occurs much more frequently than in other situations.
(16) For all patients with teratoma, we recommend CT of the thorax and abdomen, with bipedal lymphography for those with normal CT scans.
(17) One hundred patients with histologically proven carcinoma of the prostate were examined by radionuclide bone scintigraphy and bipedal lymphography.
(18) The fossil evidence suggests that Homo habilis and Paranthropus may have attained a similar grade of bipedality at roughly 1.8 m.y.
(19) No Monte Desert rodent has developed the specialized desert traits that have evolved in most desert rodent faunas of the world, although extinct marsupials similar to living bipedal desert rodents were present in the Monte as recently as late Pliocene.
(20) Compared with resting posture, the principal findings are 1) cardiac output shows a minimal increase for humans in bipedal stance and a noticeable increase for dogs as well as humans in quadrupedal stance; 2) quadrupedal stance in humans and dogs and bipedal stance in dogs require increased blood supply to the muscles of the neck, back, and limbs, while human bipedal stance requires none of these; 3) cerebral blood flow (internal carotid) in humans did not change as a result of bipedal posture or locomotion, but showed a noticeable drop in quadrupedal posture and an even further drop in quadrupedal locomotion.
Quadruped
Definition:
(a.) Having four feet.
(n.) An animal having four feet, as most mammals and reptiles; -- often restricted to the mammals.
Example Sentences:
(1) BigDog Facebook Twitter Pinterest BigDog is a autonomous packhorse Funded by Darpa and the US army, BigDog is Boston Dynamics’ most famous robot, a large mule-like quadruped that walks around like a dog, self balancing and navigating a range of terrain.
(2) The apparatus consists of three basic components; a set of 4 strain gauge platforms on which the quadruped is trained to stand, a restraining device to keep the animal positioned over the strain gauge platforms and two mobile plates which mechanically stimulate the left or the right forelimb to produce the placing movement.
(3) This paper describes a system for the quantitative analysis of posture and stance in the freely standing quadruped.
(4) In estimated body weight and relative height of the coronoid process, the fossil is similar to arboreal quadrupeds, such as Cebus apella and Chiropotes.
(5) Neither the position of their center of gravity nor the average position of their foot contacts is substantially different from that of other quadrupeds supporting most of their weight on their forelimbs.
(6) Spontaneous quadruped walking with the ventral surface of the body off the floor was first observed at postnatal day 11.
(7) 10.25am BST Elefántcsontpart did always look like a particularly good name for the Ivory Coast, even when I had no idea what it meant – though I could guess that the first bit related to a large grey betrunked quadruped.
(8) A device used for study of postural reactions associated with placing movement in the quadruped is described.
(9) The energetic cost for walking is relatively higher for penguins than for other birds or for quadrupeds of similar body mass.
(10) These experiments evaluated the relative contributions of alpha- and beta-adrenoceptors to control of plasma renin activity (PRA) in conscious dogs in which PRA was elevated to two- and threefold basal levels by the orthostatic stress of passive quadruped standing and by 24-h water deprivation.
(11) Many parameters of gait and performance, including stride frequency, stride length, maximum speed, and rate of O2 uptake are experimentally found to be power-law functions of body weight in running quadrupeds.
(12) Ferrocyanide, a nontoxic, quadrupally charged anion was not absorbed; it could therefore be used as an osmotically active solute with reflection coefficient of 1.0 to adjust rates of fluid absorption, Jv, and to measure the coefficient of osmotic flow, Lp.
(13) Quadrupeds generally use the trot or its variations at moderate speeds, and first the canter and then the gallop as speed increases.
(14) Running in both bipeds and quadrupeds generally involves at least one aerial phase per stride cycle, but certain perturbations to running including running in circles, running under enhanced gravity, running on compliant surfaces and running with increased knee flexion (Groucho running) can reduce the aerial phase, even to zero.
(15) Compared to data obtained in quadrupeds, these results suggest that the entrainment of breathing frequency by the locomotor activity is due to central interactions between the respiratory and locomotor pattern generators and does not depend on a chemical regulation avoided here by short locomotor sequences.
(16) 1) Although periodic passive hindlimb movements can reproduce the enhancement of breathing frequency seen at the onset of muscular exercise, we have shown previously that they were unable to induce the 1:1 coupling which is observed between locomotion and respiration during galloping in quadrupeds.
(17) Experiments on human wrist-pendular activity and detailed analyses of the mass and length dependencies of the locomotory cycle times of quadrupeds, large birds, small passerines, hummingbirds, and insects are performed with respect to the dynamical properties predicted for systems in the pendular clocking mode.
(18) The ultrastructure of the bearing surface of baboon articular cartilage resembles that of quadrupeds such as the dog.
(19) MACN-SC 101 may represent the incipient divergence of a generalized platyrrhine arboreal quadruped toward a more suspensory form.
(20) If you’ve got a quadruped robot, or a robot with wheels, it’s not really designed for that environment, so it might be able to adapt.