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Article: Group I projections from intrinsic foot muscles to motoneurones of leg and thigh muscles in humans.

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Marque P; Nicolas G; Marchand-Pauvert V; Gautier J; Simonetta-Moreau M; Pierrot-Deseilligny E
J. Physiol. (Lond.), 2001


Table 1

Strength, latency and duration of monosynaptic Ia excitation, late excitation and late inhibition elicited by group I afferents in the different MN pools tested

TA Per brev Sol GM VL ST Bi
Monosynaptic excitation
 Frequency 18/42 (43 %) 4/21 (19%) 10/22 (45 %) 5/15 (33 %) 10/25 (40 %) 11/26 (42 %) 4/15 (27 %)
 Size 4.2 ± 0.5 3 ± 0.7 2.7 ± 0.7 2.9± 0.3 3 ± 0.7 2.2 ± 0.5 3 ± 0.4
Late excitation
 Frequency 30/42 (71 %) 20/21 (95%) 1/17 (6%) 0/15 4/25 (16 %) 2/26 (13 %) 1/15 (6 %)
 Size 8.5 ± 1.1 6.3 ± 1 2 3.1 ± 1 2.1 ± 0.3 6
 Latency 4.1 ± 0.4 6.2 ± 0.5 3.5 4.8 ± 1.5 5.8 ± 0.2 6.6
 Duration 2.8 ± 0.3 5.1 ± 0.5 4 1.1 ± 0.9 1.8 ± 0.3 0.5
Late inhibition
 Frequency 0/42 0/21 19/22 (86 %) 11/15 (73 %) 10/25 (40 %) 12/26 (46 %) 11/15 (73 %)
 Size 13.3 ± 1.6 11.4 ± 0.9 5.7 ± 1.1 4.6 ± 0.7 6.2 ±0.9
 Latency 3.9± 0.5 2.6 ± 0.2 4.7 ± 0.5 3.4 ± 0.4 3.5 ± 0.7
 Duration 12.3 ± 1.2 7.8 ± 1.1 5 ± 1.1 5 ± 0.6 7.3 ± 1
  • TA, tibialis anterior; Per brev, peroneus brevis; Sol, soleus; GM, gastrocnemius medialis; VL, vastus lateralis; ST, semitendinosus; Bi, biceps femoris. Frequency: frequency of occurrence, expressed as a ratio (i.e. the number of MUs in which a significant effect (P < 0.05 at least) was evoked/the number of units tested (raw values)), and, in parentheses, as a percentage (i.e. the former as a percentage of the latter). Size: mean values (±s.e.m.) of the size of the peak (Monosynaptic and Late excitation) or trough (Late inhibition), assessed as explained in Methods and expressed as a percentage of the number of triggers, calculated in all experiments with a significant effect. Latency and Duration: mean values (±s.e.m.) of the latency and duration of the effect, in milliseconds.


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Inferred neuron-electrophysiology data values

Neuron Type Neuron Description Ephys Prop Extracted Value Standardized Value Content Source
Spinal cord ventral horn interneuron IA spike width 2.8 ± 0.3 2.8 (ms) Data Table