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Table 3 Previously reported mean patellar tendon reflex total reflex time and change scores

From: Anatomically remote muscle contraction facilitates patellar tendon reflex reinforcement while mental activity does not: a within-participants experimental trial

  TRTREST (ms) TRTJM(ms) TRT ChangeREST - JM (%)
Study n M (SD) M (SD) M
Clarkson (1978) NR 83.1 (NR) to 86.3 (NR) 77.6 (NR) to 80.6 (NR)* −5.7 to −7.6
Hayes (1972) 16 115.0 (26.8) 99.5 (NR)* −13.5
Jacobson & Edwards (1990) 10 103.4 (15.4) N/A N/A
Kroll (1968) 25 70.8 (20.1) 58.8 (10.9)* −16.9
Current study 16 117.1 (45.9) 83.1 (17.9)* −29.0
  1. Abbreviations: Total reflex time (TRT), Jendrassik maneuver (JM), not reported (NR), not applicable (N/A).
  2. *Statistically significant difference between JM and rest.