Licensing and/or Certification. No licensure or certification is necessary to become a physical therapy aide. Necessary Skills and Qualities. PT aides assist clients during their physical therapy exercises and treatments under the supervision of a physical therapist or physical therapy assistant. That means that a physical therapy aide should be physically fit, with the ability to kneel, bend and lift.
1 Top notes: This is what you smell immediately upon applying your perfume. It's the scent that first hits your nose, but then evaporates quickly.  Middle notes: The middle notes emerge as the top notes are dissipating and make up the majority of the scent.
Smells can also signal danger, fear, or dread. Although our sense of smell is our most primal, it is also very complex. To identify the smell of a rose, the brain analyzes over 300 odor molecules. The average person can discriminate between 4,000 to 10,000 different odor molecules. Much is unknown about exactly how we detect and discriminate between various odors.