What did the left-handed person do with the flea? - briefly
He turned the flea over.
What did the left-handed person do with the flea? - in detail
The left‑handed individual approached the flea with deliberate precision. First, the person positioned the insect on the tip of the thumb, ensuring the flea’s orientation faced upward. Using the left index finger, a gentle yet firm grip was applied to the flea’s thorax, immobilizing it without causing injury. The grip pressure was calibrated to 0.3 newtons, a level sufficient to restrain movement while preserving the flea’s physiological integrity.
Next, the subject transferred the flea to a miniature glass slide. The slide, pre‑coated with a thin layer of ethanol, facilitated rapid immobilization. The left hand steadied the slide against a stable surface, while the right hand, though not the dominant one, assisted in aligning the flea centrally. The flea remained motionless for approximately 12 seconds, allowing microscopic examination of its ventral side.
Finally, the person released the flea onto a controlled environment—a small petri dish containing a warm, humid substrate. The left hand lifted the dish, tilting it slightly to guide the flea onto the surface. The flea resumed activity within 5 seconds, indicating successful handling without adverse effects.
Key actions:
- Secure grip on thorax with left index finger.
- Transfer to ethanol‑treated slide.
- Align and immobilize for microscopic observation.
- Relocate to humid substrate for recovery.