What Happens in the Body The diaphragm is a muscle that stretches across the abdomen under the lungs. When a person breathes, the diaphragm contracts, creating suction that pulls air into the lungs. The phrenic nerve is what controls movement in this muscle, and when the nerve becomes irritate...
When alcohol reaches the brain it immediately reacts as a depressant. The drunk brain causes drinkers to lose sensation and decreases vision, hearing, and almost every sense. The brain controls muscle coordination, which is what makes people walk straight. This is why people fall and stumble wh...