PMID: 8592212Nov 1, 1995Paper

Unexpected motor patterns for hindlimb muscles during slope walking in the cat

Journal of Neurophysiology
J L Smith, P Carlson-Kuhta

Abstract

1. Hindlimb kinematics and motor patterns were assessed from high-speed ciné film synchronized with electromyographic (EMG) data from cats trained to walk on a walkway placed at four grades (25, 50, 75, and 100%). 2. Flexor muscles of the hip (iliopsoas) and ankle (tibialis anterior) had similar activity patterns for the swing phase of up- and down-slope walking; both flexor muscles also had stance-related activity during down-slope walking and this was unexpected. Extensor muscles of the hip (anterior biceps femoris and anterior semimembranosus), knee [vastus lateralis (VL)], and ankle [lateral gastrocnemius (LG)] were active during the stance phase of up-slope walking. The VL and LG activity was reduced in duration during stance of down-slope walking and centered around paw contact. Hip extensors, however, were totally inactive during stance of down-slope walking, and this was not expected. 3. Flexor muscles at the hip and ankle (not extensor muscles) dominated the stance phase of down-slope walking, especially at the steeper slopes. This switch in motor patterns may be required to counterbalance external forces that produced extension at the hip and ankle joints during the stance phase of down-slope walking. Neural mechanism...Continue Reading

Citations

Dec 20, 2005·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Laura A QuimbySasha N Zill
Jan 5, 2000·Physiological Reviews·J DuysensH Cruse
Jun 9, 2000·Annual Review of Physiology·K G Pearson
Aug 13, 1999·Journal of Neurophysiology·C C Raasch, F E Zajac
Oct 29, 2000·Journal of Applied Physiology·D A Homonko, E Theriault
Dec 8, 2017·Journal of Neurophysiology·T Richard Nichols
Oct 17, 2002·Journal of Applied Physiology·Gary B Gillis, Andrew A Biewener
Feb 7, 1998·Journal of Neurophysiology·J E Misiaszek, K G Pearson
Nov 11, 2016·Journal of Athletic Training·Lindsey K LepleyTimothy A Butterfield
Apr 16, 2014·Integrative and Comparative Biology·Aleksandra V Birn-Jeffery, Timothy E Higham
Feb 21, 2008·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·John D PolkD Ahluwalia
Jul 13, 2012·The Journal of Experimental Biology·Robert L Nudds, Jonathan R Codd
Feb 25, 2011·The Journal of Experimental Biology·Manning J SabatierArthur W English
Dec 6, 2001·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·G B Gillis, R W Blob

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