Projections from the cochlear nuclei in the mustache bat, Pteronotus parnellii

Journal Article · Mon Jul 15 00:00:00 EDT 1985 · J. Comp. Neurol.; (United States)

DOI:https://doi.org/10.1002/cne.902370303· OSTI ID:6255947

Zook, J M; Casseday, J H

Ascending projections of the cochlear nuclei in the mustache bat were analyzed by anterograde transport of (TH)-leucine and by retrograde transport of HRP. The authors were particularly interested in pathways to two parts of the system: (1) to the medial superior olive, because this nucleus is missing in most echolocating bats, but appears to be present in the mustache bat, and (2) to the intermediate and ventral nuclei of the lateral lemniscus, because these nuclei are hypertrophied and highly differentiated in all echolocating bats that we have examined. The results show a highly systematic projection from the anteroventral cochlear nucleus to all of the auditory nuclei in the brain stem. After an injection of (TH)-leucine in the anterior and dorsal part of the anteroventral cochlear nucleus, presumably in a region sensitive to low frequencies, label is seen in the following locations: ipsilateral to the injection in the lateral part of the lateral superior olive; bilaterally in the dorsal part of the medial superior olive; contralateral to the injection in the dorsal parts of the intermediate and ventral nuclei of the lateral lemniscus; and in the anterolateral part of the central nucleus of the inferior colliculus. After an injection of (TH)-leucine in a posterior part of the anteroventral cochlear nucleus, presumably in a region sensitive to high frequencies, labeling is in the same set of nuclei, but within each nucleus the label is now in a different location. Projections from the entire anteroventral cochlear nucleus to the inferior colliculus are confined to the ventral two-thirds of the central nucleus.

• Research Organization: Duke Univ., Durham, NC
• OSTI ID: 6255947
• Journal Information: J. Comp. Neurol.; (United States), Vol. 3, Issue 3
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
AUDITORY ORGANS
PHYSIOLOGY
LEUCINE
MEMBRANE TRANSPORT
TRITIUM COMPOUNDS
BATS
NERVE CELLS
TRACER TECHNIQUES
AMINO ACIDS
ANIMAL CELLS
ANIMALS
BODY
CARBOXYLIC ACIDS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
MAMMALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANS
SENSE ORGANS
SOMATIC CELLS
VERTEBRATES
551001* - Physiological Systems- Tracer Techniques