Charak Samhita
स्मृतेरपगमं प्राहुरपस्मारं भिषग्विदः। तमःप्रवेशं बीभत्सचेष्टं धीसत्त्वसम्प्लवात् ॥३॥
॥ Definition of apasmara॥ The expert physicians call apasmara as 'going away of memory' characterized by black-outs (feeling of entering into darkness) and revolting movements caused by conglomeration of the intellect and the mind.
english translation
smRterapagamaM prAhurapasmAraM bhiSagvidaH। tamaHpravezaM bIbhatsaceSTaM dhIsattvasamplavAt ॥3॥
hk transliteration by Sanscript