Muscle spasms can cause this.
Both the upper and lower ends of the stomach have a sphincter that regulates flow into and out of the stomach. The lower esophageal sphincter is at the top of the stomach, and the pyloric sphincter is at the lower end of the stomach.
Why would and implanted defibrillator in your heart vibrate
Actually, in general, longer and thicker strings vibrate at lower frequencies, resulting in lower pitches. Smaller and thinner strings vibrate at higher frequencies, producing higher pitches.
The abdominal cavity
A little under your stomach by your bellybutton
the more the vibration, the lower the pitch.
The heartbeat you feel in your lower stomach is the abdominal aorta beating and it is perfectly normal.
antrum
lower stomach
Thicker and heavier strings vibrate at slower rates, producing lower frequencies. The mass of the string affects its ability to vibrate at faster speeds, resulting in lower pitch sounds. Thinner strings vibrate more quickly, creating higher frequencies.
You do not get pregnant in your stomach. If your stomach is cramping it would be something you ate or a virus. If you don't feel better in a day or so, or if you start vomiting or have severe diarrhea, see a doctor.Pregnancy occurs in your uterus, which is much lower in your abdomen than your stomach. It's down in the lower intestine area.
Large objects that vibrate slowly produce lower frequency notes, which are perceived as lower in pitch. This is because the frequency of a sound wave is directly related to the speed of the vibrations creating it.