From knuckle pops to neck crunches, joint cracking is common and oddly satisfying. But what’s actually happening inside the ...

Adrenaline increases the "alertness" of the nervous system, meaning it's ready to trigger muscle contraction. It also increases the amount of blood flow and changes the tension of the muscles, which, ...

Infectious agents can cause muscle twitching and spasms, too. The most commonly known is probably tetanus, which causes a phenomenon called lockjaw, where the neck and jaw muscles contract to the ...

Cervical pain, commonly referred to as neck pain, is the discomfort in the neck's cervical spine. This can range from dull aches to sharp pain and it is usually caused due to poor posture, muscle ...

Stiff person syndrome (SPS) causes you to have muscle stiffness and spasms, often triggered by sudden noises or touch. You can use medications like muscle relaxants and anticonvulsants to relieve ...

LOS ANGELES(AP) — UCLA quarterback Nico Iamaleava is day to day with neck spasms ahead of a rivalry game with No. 19 USC on Saturday. Iamaleava left after being sacked in the third quarter of a 48-14 ...

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. LOS ANGELES (AP) — UCLA quarterback Nico Iamaleava is day to day with neck spasms ahead of a ...