Strabismus
Ophthalmologists specializing in eye muscle disorders (strabismus) had developed the method of EMG-guided injection (using the electromyogram, the electrical signal from an activated muscle, to guide injection) of local anesthetics as a diagnostic technique for evaluating an individual muscles contribution to an eye movement. Because strabismus surgery frequently needed repeating, a search was undertaken for non-surgical, injection treatments using various anesthetics, alcohols, enzymes, enzyme blockers, and snake neurotoxins. Finally, inspired by Daniel B. Drachmans work with chicks at Johns Hopkins, Alan B. Scott and colleagues injected botulinum toxin into monkey extraocular muscles. The result was remarkable; a few picograms induced paralysis that was confined to the target muscle, long in duration, and without side effects. After working out techniques for freeze-drying, buffering with albumin, and assuring sterility, potency, and safety, Scott applied to the FDA for investigational drug use, and began manufacturing botulinum type A neurotoxin in his San Francisco lab. He injected the first strabismus patients in 1977, reported its clinical utility in 1980, and had soon trained hundreds of ophthalmologists in EMG-guided injection of the drug he named Oculinum ("eye aligner"). In 1986, Oculinum Inc, Scotts micromanufacturer and distributor of botulinum toxin, was unable to obtain product liability insurance, and could no longer supply the drug. As supplies became exhausted, patients who had come to rely on periodic injections became desperate.
Apri (āprī) in Sanskrit means "conciliation, propitiation" and refers to special invocations spoken previous to the offering of oblations in an animal sacrifice. Some scholars have proposed however, that these hymns were originally meant for a family ritual centered around Agni, which was then later connected to the animal sacrifice. Aprisuktas
Of the ten Aprisuktas mentioned in Gargya Narayanas commentary,  I.13 and I.142 both invoke  the Narāśaṁsa and Tanūnapāt manifestations of Agni, I.188, III.4, IX.5 and X.110 invoke only the Tanūnapāt manifestation and II.3, V.5, VII.2 and X.70 invoke only the Narāśaṁsa manifestation. References

āprī in: Monier-Williams A Sanskrit Dictionary, 1899. R. Fick, "Gotra" in: ed. Hastings, Encyclopaedia of Religion and Ethics vol. 6, 1999, p. 355
Samir Nath, "Gotra-system" in: Dictionary Of Vedanta, 2002, p. 153.