まとめ
ゴールドフィッシュの餌の行動は,味ではなく,主に嗅覚によって引き起こされます. 嗅覚システムの刺激により,確実に餌を摂取することが開始され,この重要な活動におけるその支配的な役割が示唆される.
科学分野:
- 神経科学は神経科学である.
- 動物の行動 動物の行動
- センサリーシステム センサリーシステム
背景:
- 食事の行動は,多くの種の生存に不可欠です.
- 食事の覚醒に対する異なる感覚システムの相対的な貢献は,完全に理解されていません.
- 金魚 (Carassius auratus) は,嗅覚と味覚が発達している.
研究 の 目的:
- ゴールドフィッシュの餌付け行動の開始における嗅覚系の役割を調査する.
- 嗅覚と非嗅覚の脳の領域を刺激することで,餌の活動に及ぼす影響を比較する.
- 嗅覚系または外周的味覚系が餌を誘発する上で優位であるか否かを判断する.
主な方法:
- 双極性電極は,大きな金魚の中枢神経系に手術によって埋め込まれました.
- 電気刺激は嗅覚と非嗅覚の両方の脳の領域に適用されました.
- 刺激に対する行動的反応を観察・記録し,特に餌の活動.
- 自然に誘発された食事の行動と刺激された食事の行動を比較した.
主要な成果:
- 嗅覚脳の領域を刺激すると,一貫してステレオタイプ的な栄養活動が生じます.
- 嗅覚刺激によって誘発された食事行動は,通常の食事と区別できなかった.
- 非嗅覚領域の刺激により,比較可能な栄養反応は得られなかった.
結論:
- 嗅覚系は,金魚の餌活動を誘発する上で主要な役割を果たします.
- 嗅覚は,外周的味覚系よりも,食事を開始する上でより重要な役割を果たします.
- これらの発見は,食事などの重要な行動を誘導するにおい感の重要性を強調しています.
関連する概念動画
01:24Resting Membrane Potential
The relative difference in electrical charge, or voltage, between the inside and the outside of a cell membrane, is called the membrane potential. It is generated by differences in permeability of the membrane to various ions and the concentrations of these ions across the membrane.
The Inside of a Neuron is More Negative
The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular fluid. The...
The Inside of a Neuron is More Negative
The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular fluid. The...
01:14Action Potential
Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
01:28Electrical Synapses
Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
01:14Action Potential
Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
01:10Spinal Cord: Information Processing
The spinal cord is an integral hub for motor and sensory information that enables the brain to communicate with the peripheral nervous system (PNS). This communication consists of relaying sensory data and transmission of motor commands.
Sensory Information Processing
Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...
Sensory Information Processing
Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...