the invention and the resulting advantages can be seen in the following examples of embodiments backed up by the appended figures . the whole dry plant comes from south america or more generally from tropical countries . this plant is ground until a powdered is obtained . the extraction of the ground plant is performed in a mixture of ethanol at 96 . 2 ° h 2 o ( 80 / 20 ); volume / volume at ambient temperature subjected to magnetic stirring and protected from light , for 6 hours . the extract is then filtered through a nylon filter then through a cellulose membrane ( to 0 . 22 microns ). in example 2 , it is then lyophilised to be used diluted to 50 % in maltodextrine . to assess the ability of purified spilanthol and an acmella oleracea extract to produce a reversible blockage of muscular contractions . nerve - muscle co - culture is a culture model which is used to recreate human striated muscle cell innervation with spinal cord and spinal ganglion explants from rat embryos . after 21 days of culture , the muscle fibres formed contract spontaneously . the nerve - muscle co - culture model is a model suited to studying the influence of a substance on muscle contraction frequency , as well as to studying the recuperation of contractile activity after blockage of muscle contractions by a substance . carisprodol at 1 mm is used as a positive control for reversible blockage of muscle contractions . for each selected culture well , a muscle fibre showing regular contractions is referenced . using automated counting software , the number of contractions is counted for 30 seconds for each measurement period : before incubation ( pre - incubation frequency ), during incubation and during the contractile activity recuperation phase after elimination of the substance . each measure was taken in triplicate ( in 3 different wells ) and an activity is considered to be significant when at least 2 fibres out of 3 show the same effect according to the following modulation range : when the frequency of contractions is greater than 120 % of the pre - incubation frequency before adding the substance , we speak of an increase in the frequency of contractions , indicated by +. when the frequency becomes too high to be measurable , we speak of vibration , indicated by vib . when the frequency of contractions is between 80 % and 120 % compared to the pre - incubation frequency before adding the substance , it is not modified and is indicated by 0 . when the frequency of contractions is less than 80 % of the pre - incubation frequency before adding the substance , we speak of a decrease in the frequency of contractions , indicated by — or block ( blockage ) if it is 0 %. we speak of complete recuperation of contractile activity after blockage when at least 2 fibres out of 3 return to a frequency of contraction greater than or equal to 80 % of the pre - incubation frequency of contraction , indicated by +. we speak of incomplete recuperation of contractile activity after blockage when at least 2 fibres out of 3 return to a frequency of contraction between 10 and 80 % of the pre - incubation frequency of contraction , indicated by +/−. lyophilised extract of the aerial portions ( containing flower buds ) of acmella oleracea diluted to 50 % in maltodextrine . spilanthol purified to 97 % from an acmella oleracea extract . the frequency of contraction is determined after 5 minutes , 1 hour and 6 hours of incubation with the substance . at 6 hours , the substance is eliminated and recuperation of contractile activity is studied 1 hour and 24 hours later . the frequency of contraction is determined ( at 5 minutes , 1 hour and 6 hours ) until a blockage of contractions is obtained with the substance . once blockage is achieved , the substance is eliminated and recuperation of contractile activity is studied at 1 hour , 4 hours and 24 hours . at the concentrations ( 40 × 10 − 5 % and 160 × 10 − 5 %), pure spilanthol blocks muscle contractions after 5 minutes of incubation . the blockage is maintained until 6 hours and the fibres remain blocked for 24 hours after elimination of the substance . at a concentration of 600 × 10 − 5 %, the extract blocks the frequency of contraction of muscle fibres after 6 hours of incubation . after washout of the cultures , the muscle fibres totally recuperate their contractile activity in 1 hour . at concentrations of 1 , 200 × 10 − 5 % and 2 , 400 × 10 − 5 %, the extract blocks the frequency of contraction of muscle fibres after 5 minutes of incubation . after washout of the cultures , the muscle fibres totally recuperate their contractile activity in 1 hour . under the conditions of the study , the acmella oleracea extract and the spilanthol compound lead to a blockage of muscle contractions . recuperation of contractile activity is observed in presence of the plant extract but not observed in presence of spilanthol . this difference should probably be attributed to a difference in the protocol since the nerve - muscle system was only incubated for 5 minutes in presence of the extract compared to 6 hours in presence of pure spilanthol . the anti - wrinkle effect of botulinum toxin lies in its ability to inhibit subcutaneous muscle contractions considered to be responsible for expression lines ( deep wrinkles ); the substances tested , given their ability to inhibit contractile activity ( or botox - like effect ), have the same anti - wrinkle potential as botulinum toxin .
spilanthol , in the form of an acmella oleracea extract , inhibits contractions in subcutaneous muscles , notably those of the face , and can be used as an anti - wrinkle product . a cosmetic treatment procedure for wrinkles consists of locally or subcutaneously applying an effective quantity of a composition based on spilanthol pure or in the form of an acmella oleracea extract .