Activity of a pyramidal tract projecting cell (PTN) of  motor cortex during walking on the flat surface and horizontal ladder with crosspieces 5, 12, and 18 cm wide. Latent period of cell’s response to stimulation of the pyramidal tract was 0.9 ms; collision test was satisfied. The cell was activated by manipulations of the contralateral shoulder. It was recorded in track 21 of Cat 7 (see cortical map).

This PTN was one of the 145 neurons, activity of which was analyzed in respect to somatosensory receptive field properties and reported in Stout and Beloozerova, 2012. Excel data spreadsheet for this paper, containing, among that of 145 other neurons, the 20 bin histogram of the activity of this PTN during flat surface and ladder-5 walking along with several evaluations of the histogram is here. PTN 3182 is cell #44 by count on the second Excel sheet entitled “Selected for paper, n=145”. It can be followed on the other sheets of that Excel file by its unique number and the number of the recording file. PTN was recorded on channel 7 (cell 2).

This PTN was also recorded during walking on ladders with crosspieces 12 and 18 cm wide, and was one of the 63 neurons, the activity of which in respect to the level of accuracy demand on stepping was  evaluated and reported in Beloozerova et al, 2010. Excel data spreadsheet for this paper, containing, among that of 63 other neurons, the 10 bin histogram of the activity of this PTN during flat surface walking and walking on ladders with crosspieces 5, 12, and 18 cm wide along with several evaluations of the histogram is here.

This PTN was recorded simultaneously with several neurons from the ventrolateral thalamus: VL 120 and 121 (in file walking_829; flat and ladder-5), VL 122 (in file walking_830; flat and ladder-18), and VL 123 (in file walking_131; flat and ladder-12). All these VL cells were  recorded in thalamic track 3 (see thalamic map). VL 120, 121, and 123 were projecting to the motor cortex, that is, were thalamo-cortical projecting cells, TCs. Latent periods of their responses from motor cortex were 1.0, 1.9, and 1.2, respectively. VL 120 and 121 responded to touch and movement of the contralateral hip.  VL 122 and 123 responded to manipulation of contralateral forelimb. All VL cells were recorded on channel 2 (cell 1). From all these VL cells, only VL 123 was included in the data base on the activity of VL during locomotion on the flat surface and ladder reported in Marlinski et al., 2012. It has its own post in this database, VL 123. Other VL cells were not included apparently because of a not sufficiently good quality of recordings as judged by Drs. Marlinski and Beloozerova.

walking_829 (flat surface and ladder-5 walking):
     (1) main data file, clustered, Spike2
          information file, Spike2
     (2) main data file, clustered, txt
          main data file, clustered, mat
     (3) selected channels for locom_cat3M , txt

   
  (4) spike rastes, .rs format, zipped (see how to plot rasters)         
          
Thus, for this PTN flat surface and ladder-5 walking, the data include: (1) original recording in Spike2, which includes clustering of the PTN and VL cells by IB; (2) .txt and .mat exports of this entire recording; (3) a .txt export of only the times of spikes, the beginnings of swing and stance phases of the stride of the right forelimb; and moments of entering and exiting the test corridors; and (4) IB assessment of the activity of this PTN during flat surface and ladder-5 walking. Images below illustrate some of the walking-826 file data content. Actual data are in the links above.

walking_830 (flat surface and ladder-18 walking):
     (1) main data file, only preliminary clustered, Spike2
          information file, Spike2
     (2) main data file, preliminary clustered, txt
          main data file, preliminary clustered, mat  

  walking_831 (flat surface and ladder-12 walking):
     (1) main data file, only preliminary clustered, Spike2
          information file, Spike2
     (2) main data file, only preliminary clustered, txt
          main data file, only preliminary clustered, mat   

Final clustering for files 830 and 831 was not available at the time of data upload to the database. The recording is very good, however, so clustering of these files does not present any particular difficulty.

See post on PTN 3182 and post on PTN 3198 for examples of images illustrating some of the walking files data content.