Lamprey Thalamus

Searching Google for "lamprey thalamus" found 229,000 references. 

Searching PubMed for "lamprey thalamus" found 49 references:  

29<49 1997
Diencephalic projection to reticulospinal neurons involved in the initiation of locomotion in adult lampreys Lampetra fluviatilis.    
The projections from the Ventral Thalamus  to the reticulospinal neurons in the PRRN and MRRN thus provide excitatory inputs to the reticulospinal neurons, which, in turn, can activate the spinal circuits underlying locomotion."    
    See  Initiation of Locomotion in Lampreys   for full Abstract, Related citations, Cited by's and a Brief Summary.    

26<49 1998
Diencephalic and mesencephalic projections to rhombencephalic reticular nuclei in lampreys.   
    This makes it sound as though behavior is initiated in the rhombencephalon, which is way below the NAC, GP, STN, Th, PTc and Tec
    See:  Diencephaloreticular Transmission for full Abstract and Related citations  .  

14<49 2007
Descending GABAergic projections to the mesencephalic locomotor region in the lamprey Petromyzon marinus.    
My comments:   
    This paper provides strong support to my impression that release of GABAergic inhibition is an important, and perhaps even necessary, part of behavior.     
GABA/Glycine Inhibition