Book chapter
Electroreception Depends on Hair Cell-Derived Senses in Some Vertebrates
Evolution of Neurosensory Cells and Systems
CRC Press
2022
DOI: 10.1201/9781003092810-9
Abstract
Electroreception, a sense that was first described by Lissmann, has gained tremendous knowledge in the past 70 years and is now considered one of the earliest inventions of vertebrates. However, the electrosensory division was lost multiple times (hagfish, frogs, amniotes, most teleosts) and independently evolved twice in derived teleosts. Electroreceptor neurons branch exclusively from the ventral branch of the anterior lateral line fibers mostly to the head in a common unique pattern in most non-teleost vertebrates, whereas in teleost vertebrates electroreceptor organs are found on both head and trunk and afferents project via the anterior and posterior lateral line nerve. Most electroreceptors’ hair cells have a primary cilium (kinocilium), but it differs with respect to its length and the presence (lamprey, salamanders, derived teleosts) or absence of actin-rich microvilli (stereovilli; cartilaginous fish, lungfish, caecilians). Hair cells that are dominated by a kinocilium are usually innervated by a single afferent fiber. Innervation terminates in contact with variously sized and shaped synaptic ribbons. Central projections reach the dorsal nucleus where afferents overlap in many vertebrates. Multiple and serial topological innervations are known in derived teleosts, notably in gymnotids and mormyrids. Second-order projections reach the torus semicircularis as a main hub. From here, fibers extend to the thalamus and the telencephalon in derived teleosts.
Details
- Title: Subtitle
- Electroreception Depends on Hair Cell-Derived Senses in Some Vertebrates
- Creators
- Sarah Nicola JungValerie LucksKaren L. ElliottBernd Fritzsch
- Resource Type
- Book chapter
- Publication Details
- Evolution of Neurosensory Cells and Systems
- DOI
- 10.1201/9781003092810-9
- Publisher
- CRC Press; Boca Raton, FL
- Language
- English
- Date published
- 2022
- Academic Unit
- Iowa Neuroscience Institute; Biology; Craniofacial Anomalies Research Center
- Record Identifier
- 9984530370902771
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