I have now gone through the complete library catalog (all ~125 books). There is no book called "Sarthak" in this medical textbook library, and the term "nidra" does not appear in any of the available texts either.
Here is a full summary of what I found:
Result
The book "Sarthak" is not available in this medical textbook library. The library contains approximately 125 medical/clinical textbooks (standard Western medical references like Gray's Anatomy, Guyton, Harrison's, Robbins, etc.) plus a few specialized resources (CA taxation, ACCA, demo orthopaedic videos).
A search for the term "nidra" across all paragraphs and headings in the entire library also returned no results.
What "Sarthak" likely refers to:
- Sarthak is likely an Ayurveda textbook used in Indian Ayurvedic medical education (BAMS/MD Ayurveda curriculum). It covers topics like Nidra (sleep) as one of the three pillars of life (Trayopasthambha - Ahara, Nidra, Brahmacharya) per classical texts like Ashtanga Hridayam or Charaka Samhita.
- This book is not part of the current library database, so I cannot retrieve references from it.
What I can tell you about Nidra from Ayurvedic knowledge:
- Nidra (sleep) is described in texts like Charaka Samhita (Sutrasthana Ch. 21) and Ashtanga Hridayam (Sutrasthana Ch. 7)
- It is classified as one of the Trayopasthambhas (three supporting pillars of life)
- Types include Tamobhava (caused by tamas), Shleeshmasamudbhava (caused by kapha), Manovyapara-shanta (when mind activity ceases), etc.
- Proper nidra maintains health; improper nidra causes sukha (happiness) or dukha (misery)
If you have the Sarthak book as a PDF or document, you can upload it here and I will extract all references to nidra from it directly. Alternatively, if you can clarify the full title or author of the "Sarthak" book, I can search for it more specifically.