The 36-year-old actress, a regular on “The Big Bang Theory” and best known for the title role on the 90’s sitcom “Blossom,” was injured this afternoon in a car accident:

It all went down on the corner of Hollywood Blvd. and La Brea around noon … sources tell us the former “Blossom” actress was traveling alone in a white Volvo which was struck in the intersection by another vehicle filled with tourists from Chile.

We’re told emergency responders raced to the scene. One source tells us there was “tons and tons of blood everywhere.”

Sources tell us Bialik sustained major damage to her left hand … and “her finger was almost completely severed … it was just hanging there.”

Per @TMZ actress #MayimBialik was driving this Volvo. We wish... on Twitpic

Supportive tweets poured in:

Bialik expressed her gratitude for all the well wishes:

Best wishes for a speedy recovery!