Intercostal muscle: The small intercostal muscles between the ribs and sternoclicomastoid muscles probably went into spasm at the time you yawned, causing a contraction to the ribs while you were inhaling
Answered 6/6/2015
3.7k views
3 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question