| Ventrobasal Thalamus Necessary for Visually-Released Defensive Boxing of Rat | Table 2: Complete Results | Page 10 |
| Group* | AnimalΦ | Initial postop± | Facial Anes§ | FA + CE¶ | FA + IE# | Other Structures Damaged** | ||||||
| Thres. | % | Comp. | % | Comp. | % | Comp. | % | Comp. | Completely | Partially | ||
| Complete bilateral lesion of ventrobasal thalamus | ||||||||||||
| 1. | .10 | 24 | UPT | 0 | none | -- | -- | -- | -- | PF, MD | LG, LTN, PVG, ML | |
| 2. | .20 | 23 | UPT | 0 | none | -- | -- | -- | -- | PF, ML | LG, PVG | |
| 3. | .20 | 15 | UPT | 0 | none | -- | -- | -- | -- | PF, LTN, PT | LG, PVG, MD | |
| 5. | .35 | 11 | UPT | 4 | UPB | -- | -- | -- | -- | - | ML | |
| 6. | .10 | 18 | UPT | 0 | P | -- | -- | -- | -- | PF | LTN | |
| 7. | .09 | 35 | UPT | 0 | none | -- | -- | -- | -- | PF | LTN, ML, MD | |
| 8. | .15 | 28 | UPT | 0 | none | -- | -- | -- | -- | LTH | PF, ML, MD | |
| 9. | .10 | 32 | UPT | 0 | none | -- | -- | -- | -- | PF | LTN, PVG, MD | |
| Complete unilateral lesion of ventrobasal thalamus | ||||||||||||
| 12. | .32 | 12 | UPT | (not tested) | 7 | UP | 0 | B | ML | LTN | ||
| 15. | .10 | 28 | UPT | 16 | UP | 7 | UP | 0 | none | PF, LTN | ML | |
| Complete bilateral lesion of medial lemniscus | ||||||||||||
| 16. | .32 | 22 | UPT | 0 | none | -- | -- | -- | -- | -- | SN | |
| Partial bilateral lesion of ventrobasal thalamus | ||||||||||||
| 4. | .07 | 28 | UPT | 5 | UPB | -- | -- | -- | -- | -- | MD | |
| 11. | .20 | 20 | UPT | 19 | UP | -- | -- | -- | -- | PF | LTN, PVG, MD | |
| Partial unilateral lesion of ventrobasal thalamus | ||||||||||||
| 13. | .10 | 41 | UPT | (not tested) | (not tested) | 19 | UP | -- | PF, LTN | |||
| 14. | .34 | 25 | UPT | 11 | UPB | 15 | UP | 12 | UP | -- | PF | |
| Control or sham lesions (no damage to ventrobasal or medial thalamus) | ||||||||||||
| 10. | .05 | 20 | UPT | 26 | UPB | -- | -- | -- | -- | -- | PF, LTN | |
| 20. | .10 | 36 | UPT | 17 | UP | -- | -- | -- | PF | MD | ||
| 17. | .09 | 11 | UPT | 7 | UPB | -- | -- | -- | -- | -- | -- | |
| 18. | .15 | 28 | UPT | 20 | UPB | -- | -- | -- | -- | -- | -- | |
| 19. | .13 | 29 | UPT | 27 | UP | -- | -- | -- | -- | -- | -- | |
* Groups for purposes of this table are based on post-hoc histological data. Φ Animals 6,7, 8, 9, 10, 11, 15, 16 and 20 were 'experienced.' All others were 'naive' prior to brain surgery. ± Thresh.= boxing threshold; %=percent of shocks on which boxing occurred; Comp. = components of boxing; U = upright posture present; P = paw movements present; T = Tracking present; B = test animal bitten by normal opponent. § Data from initial test with facial anesthesia; no eye closure. Symbols as above. ¶ Data from test with facial anesthesia and closure of contralateral eye. Symbols as above. # Data from test with facial anesthesia and closure of ipsilateral eye. Symbols as above. ** Neural structures: PF = parafascicular nucleus; LG = lateral geniculate nucleus; LTN = lateral thalamic nucleus; PVG = periventricular gray; ML = medial lemniscus; MD = nucleus medialis dorsalis; SN = substantia nigra; PT = pretectum. |
||||||||||||
| |
|
|