|Exhibit
10.12


December 12, 2001


Dr. Michael M. Merzenich
20 Hillpoint
San Francisco, CA  94117


Re:  Extension of Consulting Agreement for 2002


Dear Mike:


Your Consulting Agreement
with Scientific Learning Corporation (the Company) dated September
20, 1996, as previously amended (the Agreement) provides that you
will provide consulting services to the Company for the period commencing
January 1, 1998 through December 31, 2001.


This letter confirms that the Company and you have now agreed to extend this Agreement, as follows:
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | a. The term of the Agreement shall be extended to terminate on December 31, 2002, unless
earlier terminated pursuant to Section 19 of the Agreement
or unless later further extended by mutual written consent of you and the Company.
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | b. During
calendar year 2002, you agree to provide approximately 20% of your professional time for
consulting activities under the Agreement. However, if your employment arrangements with
UCSF do not permit you to commit 20% of your professional time to activities under the
Agreement, you agree to commit the maximum time permitted by the UCSF policies.
| | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | c.Your
consulting rate for calendar year 2002 will be $2817 per month, which is equivalent to a
rate of $650 per day (subject to adjustment as set forth in the Agreement).
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|Please confirm your
agreement by countersigning and returning a copy of this letter to Linda Carloni
for our files. We look forward to another year of collaboration.


Sincerely,


SCIENTIFIC LEARNING CORPORATION

By: /s/ Frank Mattson

Frank Mattson
President

ACKNOWLEDGED AND AGREED:

/s/ Michael M. Merzenich   

Michael M. Merzenich


Date:    Jan. 17, 2002                      

|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|December 12, 2001


Dr. Paula Tallal
4403 Hermosa Way
San Diego CA   92103


Re:  Extension of Consulting Agreement for 2002


Dear Paula:


Your Consulting Agreement
with Scientific Learning Corporation (the Company) dated September
19, 1996, as previously amended (the Agreement) provides that you
will devote an aggregate of up to one day per week to consulting activities for
the Company for the period commencing January 1, 1998 through December 31, 2001.
..


This letter confirms that
the Company and you have now agreed to extend this Agreement, as follows:
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | a.
The term of the Agreement shall be extended to terminate on December 31, 2002, unless
earlier terminated pursuant to Section 19 of the Agreement or unless later further
extended by mutual written consent of you and the Company.
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | b.
During calendar year 2002, you agree to provide an aggregate of one day per week, on
average, for consulting activities under the Agreement.
| | -----------------------------------------------------------------------------------------------------------------------------------------------

| | c.
Your consulting rate for calendar year 2002 will be $650 per day (subject to adjustment
as set forth in the Agreement).
| | --------------------------------------------------------------------------------------------------------------------------

|Please confirm your
agreement by countersigning and returning a copy of this letter to Linda Carloni
for our files. We look forward to another year of collaboration.


SCIENTIFIC LEARNING CORPORATION

By: /s/ Frank Mattson

Frank Mattson
President

ACKNOWLEDGED AND AGREED:

/s/ Paula A. Tallal

Paula A. Tallal


Date: Dec. 26, 2001


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