Question: Who voiced the mother of Howard?
About the article "The Big Bang Theory", section "Howard's mother".

Candidate passages:
  Slickis (voiced by Billy Vera) – Ickis' father and was one of The Gromble's favorite student.
Horvak (voiced by David Eccles) – Krumm's father.
Mama Gromble (voiced by Andrea Martin) – The Gromble's mother.
Sublima (voiced by Charlie Adler) – Oblina's mother.
Skeetch (voiced by Marvin Kaplan) – Oblina's father.
Nicky (voiced by Steven Hartman) – The monsters' only human friend.
He is a 10-year-old boy who befriended Ickis.
The Shroink (voiced by Michael Prince) – An elderly monster.
Dizzle (voiced by Cynthia Mann) – A female monster student who likes Ickis.
Dr. Buzz Kutt (voiced by Edward Winter) - A monster who is the residential doctor.
Borl (voiced by Michael Dorn) -   Kriggle (voiced by Dorian Harewood) -   Exposia Vertov (voiced by Lisa Raggio) -   Snav (voiced by Xander Berkeley) -   Zooeuh (voiced by Kevin Michael Richardson) -   Phuepal (voiced by Victor Wilson) -   Marty (voiced by Thomas F. Wilson) -   Deitrich Dunlap (voiced by Bronson Pinchot) -   
Mother Duck (voiced by Tara Strong) is a duck who is the mother of Bradley, Samuel, Ramona, and Eggy. 
 Little Bear (voiced by Kristin Fairlie) Mother Bear (voiced by Janet Laine-Green) Owl (voiced by Amos Crawley) Duck (voiced by Tracy Ryan) Hen (voiced by Elizabeth Hanna) Cat (voiced by Andrew Sabiston) Father Bear (voiced by Dan Hennessey) Moose (voiced by Ray Landry)  Cub (voiced by Kyle Fairlie) - A wild dark brown bear who lives in the wilderness with his parents.
Unlike Little Bear, he walks mostly on all fours rather than upright, though he occasionally walks on two paws.
He can sometimes be a bit mean, but he becomes a good friend of Little Bear.
Trouble (voiced by Wayne Best) - A hungry Mountain lion who aims to eat Little Bear, Cub or one of their friends.
Little Moose (voiced by Max Morrow) - A shy friend of Cub's.
Mother Moose (voiced by Catherine Disher) - Little Moose's mother.
Poppy and Pete (voiced by Cole Caplan and Asa Perlman) - Two playful red foxes that keep Cub company in the absence of his parents.
Cub's Father (voiced by Maurice Dean Wint) Cub's Mother (voiced by Alison Sealy Smith)  
  Texas Pete (voiced by Victor Spinetti) - The principal antagonist of the series.
* Bulk (voiced by Frank Welker) - Texas Pete's henchman.
* Skeleton (voiced by Melvyn Hayes) - Texas Pete's henchman.
Polka Face (voiced by Howard Morris) - The Polka Dot Tribe leader.
He turns into a nice character in the end of "Dot's Entertainment."
Bubbles the Clown (voiced by Frank Welker) -  Sleepless Knight (voiced by Kenneth Mars) - A knight who gives people nightmares.
Dr.
Frost (voiced by Corey Burton) - * Pengy (voiced by Charlie Adler) - Dr.
Frost's penguin henchman.
Prince Pyjamarama (voiced by Don Adams ) - Prince Pyjamarama is Prince Rajeash's uncle and the main antagonist of the episode "Ruse of the Raja."
He and his helper Mufti become traitors to Prince Rajeash.
* Mufti (voiced by Bob Arbogast) - Prince Pyjamarama's henchman.  
Mayor Howard (voiced by Lee Tockar) is the Mayor of Porkbelly and is a short, bald man who easily panics at the first sign of trouble, and caves under pressure.
Whenever a villain appears, he swears allegiance with the villain and changes the name of the city without being asked.
In the episode Johnny Test Zombie Tea Party it is revealed he has a mother who still lives with him and his first name is Howard.
His father is never seen but could be dead or divorced.