Oakland Raiders defensive lineman Richard Seymour returned to practice Thursday as a limited participant after being sidelined Wednesday with a knee injury, according to a report on CSNBayArea.com.

The Raiders also saw improvements from wide receiver Rod Streater and offensive lineman Alex Parsons, both of who were upgraded to full participation.

Running back Darren McFadden, kicker Sebastian Janikowski and tight end Brandon Myers, who has yet to be cleared for full contact after suffering a concussion, were limited participants. Wide receiver Darrius Heyward-Bey, who took a scary hit against the Pittsburgh Steelers and is dealing with a neck injury and a concussion, did not practice for the second straight day. Offensive lineman Khalif Barnes and cornerback Shawntae Spencer were also held out of practice.

Here is Oakland's entire injury report from Thursday, according to CSNBayArea.com.

Did not participate -- WR Darrius Heyward-Bey (concussion/neck), RT Khalif Barnes (groin), CB Shawntae Spencer (right foot).

Limited participation in practice -- RB Mike Goodson (hamstring), RB Darren McFadden (shoulder), TE Brandon Myers (concussion), PK Sebastian Janikowski (left groin), NT Tommy Kelly (knee), DT Richard Seymour (knee).

Full participation in practice -- DB Michael Huff (knee), TE David Ausberry (shoulder), WR Rod Streater (eye), C/G Alex Parsons (shoulder).