Abstract
Removal of the pineal gland modifies the entrainment behavior of house sparrows. Abnormal entrainment occurs in pinealectomized sparrows exposed to 'skeleton' photoperiods (light cycles composed of 2 pulses of light per 24-h cycle). This abnormal entrainment depends upon the state of the locomotor activity (rhythmic or arrhythmic) before exposure to the light cycle, and upon the interval between the 2 pulses of light which constitute the skeleton photoperiod. The conditions that produce abnormal entrainment in pinealectomized birds are strongly correlated with those that produce 2 stable phases of entrainment to skeleton photoperiods in normal birds ('bistability phenomenon'). These results suggest that after pinealectomy, there remains a population of oscillators whose combined output is reflected in the locomotor activity of individual sparrows.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 245-253 |
| Number of pages | 9 |
| Journal | Journal of Comparative Physiology □ A |
| Volume | 146 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jun 1982 |
Fingerprint
ASJC Scopus subject areas
- Behavioral Neuroscience
- Neuroscience(all)
- Physiology (medical)
- Physiology
- Animal Science and Zoology
Cite this
Entrainment of the circadian system of the house sparrow : A population of oscillators in pinealectomized birds. / Takahashi, Joseph S.; Menaker, Michael.
In: Journal of Comparative Physiology □ A, Vol. 146, No. 2, 06.1982, p. 245-253.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Entrainment of the circadian system of the house sparrow
T2 - A population of oscillators in pinealectomized birds
AU - Takahashi, Joseph S.
AU - Menaker, Michael
PY - 1982/6
Y1 - 1982/6
N2 - Removal of the pineal gland modifies the entrainment behavior of house sparrows. Abnormal entrainment occurs in pinealectomized sparrows exposed to 'skeleton' photoperiods (light cycles composed of 2 pulses of light per 24-h cycle). This abnormal entrainment depends upon the state of the locomotor activity (rhythmic or arrhythmic) before exposure to the light cycle, and upon the interval between the 2 pulses of light which constitute the skeleton photoperiod. The conditions that produce abnormal entrainment in pinealectomized birds are strongly correlated with those that produce 2 stable phases of entrainment to skeleton photoperiods in normal birds ('bistability phenomenon'). These results suggest that after pinealectomy, there remains a population of oscillators whose combined output is reflected in the locomotor activity of individual sparrows.
AB - Removal of the pineal gland modifies the entrainment behavior of house sparrows. Abnormal entrainment occurs in pinealectomized sparrows exposed to 'skeleton' photoperiods (light cycles composed of 2 pulses of light per 24-h cycle). This abnormal entrainment depends upon the state of the locomotor activity (rhythmic or arrhythmic) before exposure to the light cycle, and upon the interval between the 2 pulses of light which constitute the skeleton photoperiod. The conditions that produce abnormal entrainment in pinealectomized birds are strongly correlated with those that produce 2 stable phases of entrainment to skeleton photoperiods in normal birds ('bistability phenomenon'). These results suggest that after pinealectomy, there remains a population of oscillators whose combined output is reflected in the locomotor activity of individual sparrows.
UR - http://www.scopus.com/inward/record.url?scp=34250227894&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34250227894&partnerID=8YFLogxK
U2 - 10.1007/BF00610244
DO - 10.1007/BF00610244
M3 - Article
AN - SCOPUS:34250227894
VL - 146
SP - 245
EP - 253
JO - Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology
JF - Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology
SN - 0340-7594
IS - 2
ER -