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Titolo:
Locomotory organs of mammals: New mechanics and feed-back pathways but conservative central control
Autore:
Fischer, MS;
Indirizzi:
Univ Jena, Inst Spezielle Zool & Evolut Biol, Phyletischem Museum, D-07743Jena, Germany Univ Jena Jena Germany D-07743 Phyletischem Museum, D-07743Jena, Germany
Titolo Testata:
ZOOLOGY-ANALYSIS OF COMPLEX SYSTEMS
fascicolo: 3-4, volume: 103, anno: 2001,
pagine: 230 - 239
SICI:
0944-2006(2001)103:3-4<230:LOOMNM>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
CAT LATERAL GASTROCNEMIUS; QUADRUPEDAL WALKING; HINDLIMB KINETICS; HEALTHY-SUBJECTS; MUSCLES; FORELIMB; EMG; COMPARTMENTALIZATION; INNERVATION; SHOULDER;
Keywords:
locomotion; neural control; EMG; biomechanics; kinematics;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
64
Recensione:
Indirizzi per estratti:
Indirizzo: Fischer, MS Univ Jena, Inst Spezielle Zool & Evolut Biol, Phyletischem Museum, Erbertstr 1, D-07743 Jena, Germany Univ Jena Erbertstr 1 Jena GermanyD-07743 7743 Jena, Germany
Citazione:
M.S. Fischer, "Locomotory organs of mammals: New mechanics and feed-back pathways but conservative central control", ZOOL-AN COM, 103(3-4), 2001, pp. 230-239

Abstract

The dynamic stability of quadrupedal mammalian locomotion from small to medium body size is based on limbs which follow a couple of rather simple mechanical rules (zigzag configuration of equally proportioned segments, 'pantograph behaviour' (see p. 7), position of scapular pivot and hip joint at the same height and consecutively the same functional length of fore- and hind limbs, clear functional separation of a propulsive proximal segment fromdistal joints used for fine tuning of ground contact, position of forelimbtouch down just below the eye). Intra- and inter limb kinematics are the obvious expression of activities of central and peripheral control systems. During cyclic locomotion muscles act mainly against gravity, stabilise and position the three-segmented therian limb. The intrinsic mechanical properties of the locomotory organs especially muscles reduce the need for control. Furthermore, muscles control their stiffness themselves by a afferent feedback system which modulates external effects. Adaptive mechanics and seemingly unique feedback pathways in therian mammals deal with highly conservative spinal rhythmogenic flexor- and extensor centres.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 14:32:54