 According to Kedrup, on his arrival in Central Tibet Tsongkhapa first studied Tibetan medicine, then a traditional Buddhist curriculum of abhidharma, tenet systems (Tib. grub mtha') focusing on the Middle Way and Mind Only (Sk. cittamātra also called yogācāra) philosophy, Buddhist ethics (Tib. sdom gsum), and epistemology (Sk. pramāṇa). His early studies were pursued mainly in institutions affiliated with the two dominant scholarly traditions (Tib. lugs) of the time: the Sangphu (gSang phu ne'u tog) tradition founded by Ngok (rNgog bLo ldan shes rab) (1059–1109), and the Sakya (Sa skya) epistemological tradition based primarily on the works of the Sa skya paṇḍi ta (1182–1251). He also studied and practiced tantric Buddhism.