Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles: DFG German National Licenses  (2)
  • Above-knee prosthesis  (1)
  • Amphibian  (1)
Source
  • Articles: DFG German National Licenses  (2)
Material
Years
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    A comparison of intact and in-vitro locomotion in an adult amphibian (1992)
    Springer
    Experimental brain research 88 (1992), S. 609-614 
    Details
    ISSN: 1432-1106
    Keywords: Locomotion ; Glycine ; NMDA ; Central pattern generation ; Amphibian
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Locomotion was compared in an intact and invitro preparation of the adult mudpuppy (Necturus maculatus) The intact animals walked on an aquatic treadmill while in-vitro preparations were made to walk with a bath application of the excitatory amino acid NMA (N-methyl DL-aspartate). EMG recordings of shoulder muscles (pectoralis, latissimus dorsi, dorsalis scapulae, and procoracohumeralis) and elbow muscles (brachialis and extensor ulnae) were obtained from intact animals while recordings were made from only the elbow muscles in-vitro. The invitro preparation required magnesium in the bath to initiate and maintain locomotion, consistent with an NMDA mediated response. Also consistent with an NMDA response was the finding that glycine potentiated the NMA induced locomotion in-vitro. The range of cycle durations seen in-vitro was well within the range seen in the intact animal, while gait analysis demonstrated the similarity of intact and in-vitro locomotor cycles. In spite of these very similar locomotor patterns there are interesting differences in the patterned output seen invitro, such as the absence of a second burst in the brachialis muscle in-vitro.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00228189
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Optimal control for the active above-knee prosthesis (1991)
    Springer
    Annals of biomedical engineering 19 (1991), S. 131-150 
    Details
    ISSN: 1573-9686
    Keywords: Optimal tracking ; Dynamic programming ; Above-knee prosthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract Control of an active above-knee prosthesis has been simulated for a selected gait activity using a hierarchical closed-loop method. An extension of finite-state control, referred to as artificial reflex control, was adopted at the strategic level of control. At the actuator level of control an optimal tracking method, based on dynamic programming, is applied. This deals mainly with the actuator level of control, but considers the interaction of the leg dynamics and the switching effects of artificial reflex control. Optimal tracking at the actuator level of the above-knee prosthesis reduces the on-off effects of finite-state methods, such as artificial reflex control. The proposed method can also be used for the design of prosthetic elements. Specific attention is paid to the limited torque and power in the prosthetic joint actuator, which are imposed by the principle of self-containment in the artificial leg. The hierarchical structure, integrating artificial reflex control and optimal tracking, can be used in real time, as estimated from the number of computer operations required for the suggested method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02368465
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...