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  • 1
    Electronic Resource
    Electronic Resource
    Spatial Transformation in the Vertical Vestibulocollic Reflex (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 656 (1992), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1992.tb25231.x
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  • 2
    Electronic Resource
    Electronic Resource
    Modulation by eye position of neck muscle contraction evoked by electrical labyrinthine stimulation in the alert cat (1987)
    Springer
    Experimental brain research 67 (1987), S. 411-419 
    Details
    ISSN: 1432-1106
    Keywords: Vestibular system ; Eye movements ; Vestibulo-collic reflexes ; Neck muscles ; Motor-strategies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Modulation of vestibulo-spinal reflexes by gaze is a model system for studying interactions between voluntary and reflex motor activity. In the alert cat, the EMG of Splenius and Obliquus capitis muscles increases with ipsilateral gaze eccentricity during spontaneous eye movements. Labyrinth stimulation by current pulses evokes EMGs with latencies consistent with a three neuron vestibulocollic pathway. The amplitude of evoked activity increases with eye position. The directions in which eye movements increase EMG was usually the same for both spontaneous and induced EMG activity, namely, horizontal and ipsilateral. However, sometimes the increase in spontaneous EMG occurred with horizontal eye position, whereas the induced EMG changed with vertical eye position. Spontaneous and evoked EMG are then modulated by different eye position signals. Command signals reflecting eye position probably reach two different types of neurons in the vestibulo-collic pathway, most likely secondary vestibular neurons and neck muscle motoneurons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00248561
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of muscle and cutaneous hindlimb afferents on L4 neurons whose activity is modulated by neck rotation (1989)
    Springer
    Experimental brain research 77 (1989), S. 48-56 
    Details
    ISSN: 1432-1106
    Keywords: Neck reflexes ; L4 interneurons ; Group II input
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We recorded extracellularly, in decerebrate, labyrinthectomized cats, from spontaneously active L4 neurons whose activity was modulated by head rotation, and studied the effects of stimulation of ipsilateral hindlimb nerves. Rotation of the head about the longitudinal (roll) axis was more effective than rotation about the transverse (pitch) axis or vertical (yaw) axis for this group of neurons. Most units received convergent excitatory or inhibitory inputs from several nerves, with excitation being more prominent. The most effective muscle nerves were quadriceps (37/43 neurons), sartorius (19/21) and tibialis anterior (17/ 35); stimulation of biceps posterior-semitendinosus, biceps anterior-semimembranosus, or gastrocnemius rarely influenced the firing of the neurons. Group I effects were present in only a small fraction of neurons; however, short latency (central latency ≤ 5 ms) group II effects were observed in almost one-third. Longer latency group II as well as group III inputs were also common. All neurons received inputs from mixed and cutaneous nerves which usually had low thresholds and central latencies 〉 5 ms. Most recording sites were in medial lamina VII or lamina VIII; some of the units were identified by antidromic stimulation as propriospinal neurons which projected to the lumbar enlargement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00250566
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  • 4
    Electronic Resource
    Electronic Resource
    Participation of Ia reciprocal inhibitory neurons in the spinal circuitry of the tonic neck reflex (1991)
    Springer
    Experimental brain research 84 (1991), S. 461-464 
    Details
    ISSN: 1432-1106
    Keywords: Tonic neck reflex ; Ia inhibitory neurons ; Neck receptors ; Cat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary As part of our studies of the spinal circuitry of the tonic neck reflex, we have recorded extracellularly from Ia reciprocal inhibitory neurons of the decerebrate, labyrinthectomized cat. The activity of a majority of neurons driven by stimulation of the quadriceps nerve was modulated by sinusoidal rotation of the neck; such modulation was much less frequent in the case of neurons driven by stimulation of nerves to more distal muscles. The results suggest that some of the inhibition which is part of the tonic neck reflex is mediated by Ia reciprocal inhibitory neurons, but that other pathways must also play an important role.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00231470
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  • 5
    Electronic Resource
    Electronic Resource
    Horizontal canal input to upper cervical commissural neurons (1993)
    Springer
    Experimental brain research 92 (1993), S. 549-552 
    Details
    ISSN: 1432-1106
    Keywords: Spinal cord ; Upper cervical ; Commissural neurons ; Horizontal canal input ; Cat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We studied in decerebrate, paralyzed cats, the effect of sinusoidal yaw rotation on upper cervical commissural neurons. The activity of some neurons was modulated by this stimulus, and they were classified as receiving input from the horizontal semicircular canal. The responses, which were mainly type II, were well correlated with the velocity of the stimulus. These commissural neurons, some of them propriospinal, transmit horizontal canal signals to the contralateral ventral horn, presumably to motoneurons, as well as to more caudal levels of the spinal cord.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229046
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    Paper (German National Licenses)
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