A PREPARATION OF THE BLOWFLY (CALLIPHORA-ERYTHROCEPHALA) BRAIN FOR IN-VITRO ELECTROPHYSIOLOGICAL AND PHARMACOLOGICAL STUDIES

被引：16

作者：

BROTZ, TM ^{[1
]}

EGELHAAF, M ^{[1
]}

BORST, A ^{[1
]}

机构：

[1] MAX PLANCK INST BIOL CYBERNET,D-72076 TUBINGEN,GERMANY

来源：

JOURNAL OF NEUROSCIENCE METHODS | 1995年 / 57卷 / 01期

关键词：

INSECT BRAIN; IN VITRO; MOTION DETECTION; IDENTIFIED NEURON; VISUAL SYSTEM; TECHNIQUE;

D O I：

10.1016/0165-0270(94)00121-V

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

We describe a method for the preparation and maintenance of the blowfly (Calliphora erythrocephala) brain in a recording chamber under in vitro conditions in a semi-slice configuration. Large identified neurones in the posterior part of the 3rd optic lobe (lobula plate) can be penetrated easily with microelectrodes. The so-called vertical system (VS) cells which respond to vertical image motion in vivo could be encountered best because their axons are escorted individually by specific tracheae. Fluorescent stained cells show their natural shape as being in vivo. Electrophysiological properties of the cells investigated so far, i.e., resting potential (about -40 mV) and firing properties (single rebound spikes), are comparable to recordings in intact flies. Initial pharmacological experiments on VS cells in this preparation reveal that iontophoretical application of acetylcholine and carbamylcholine results in depolarization. VS cells also respond to bath-applied nicotine (1 mu M) with a slow depolarization of their membrane potential in normal fly saline as well as in a Ca2+-free saline, suggesting direct cholinergic input via nicotinic receptors. The suitability of the preparation for a wide range of electrophysiological and pharmacological studies is discussed.

引用

页码：37 / 46

页数：10

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