The ability of four different brainstem motoneuron pools to perform a newly acquired motor task was studied in alert @entity468 . A classical conditioning of eyelid responses was carried out in (i). unoperated animals, and in animals with (ii). transection, 180 degrees rotation, and re-suture of the zygomatic @entity2103 , (iii). a crossed @entity254 of the buccal to the zygomatic @entity2103 and (iv). a @entity6256 . Animals were conditioned with a delay paradigm using a tone (350 ms, 600 Hz, 90 dB) as conditioned stimulus, followed 250 ms later by an air puff (100 ms, 3 kg/cm2) as unconditioned stimulus. Animals with @entity717 performed @entity558 ( @entity558 ) at control rate, with significantly larger amplitude, area and velocity, but a de-synchronized oscillatory pattern. Animals with buccal-zygomatic @entity254 acquired @entity558 at control rate, but these @entity558 had significantly smaller amplitude than those of controls and a de-synchronized pattern. Animals with a @entity2652 were unable to perform @entity558 . The @entity21591 triggered by the axotomy was probably the origin of the large @entity558 after @entity717 . @entity21591 could also contribute to generation of the small @entity558 recorded after buccal-zygomatic @entity254 . Although @entity21591 was also present following @entity2652 , hypoglossal motoneurons did not reach their firing threshold to perform @entity558 . In accordance with the embryonic origin of involved motoneurons, animals with @entity717 moved the ipsilateral eyelid synchronously to mouth-related activities. It is suggested that there is a gradient of adaptability in motoneuron pools forced to perform new motor tasks through foreign muscles, which depends on their embryological origins and functional properties.

Gradient of adaptability in four different motor systems performing the same learned motor task in XXXX .

@entity558 :: ('MESH:C536528', 'Disease') :: ['conditioned responses', 'CRs'] @entity2652 :: ('MESH:D005148', 'Disease') :: ['hypoglossal-facial anastomosis'] @entity6256 :: ('MESH:D020437', 'Disease') :: ['hypoglossal-facial nerve anastomosis'] @entity254 :: ('MESH:C563598', 'Disease') :: ['anastomosis'] @entity21591 :: ('MESH:D020433', 'Disease') :: ['Trigeminal hyper-reflexia', 'trigeminal hyper-reflexia'] @entity2103 :: ('MESH:D005155', 'Disease') :: ['facial nerve branch'] @entity717 :: ('MESH:D009069', 'Disease') :: ['buccal-zygomatic and hypoglossal-facial anastomoses', 'zygomatic nerve rotation'] @entity468 :: ('9685', 'Species') :: ['cats']
@entity468 :: (9685,Species) :: ['cats']
