A Missing Connection: A Review of the Macrostructural Anatomy and Tractography of the Acoustic Radiation

The auditory system of mammals is dedicated to encoding, elaborating and transporting acoustic information from the auditory nerve to the auditory cortex. The acoustic radiation (AR) constitutes the thalamo-cortical projection of this system, conveying the auditory signals from the medial geniculate...

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Vydáno v:Frontiers in neuroanatomy Ročník 13; s. 27
Hlavní autoři: Maffei, Chiara, Sarubbo, Silvio, Jovicich, Jorge
Médium: Journal Article
Jazyk:angličtina
Vydáno: Switzerland Frontiers Research Foundation 07.03.2019
Frontiers Media S.A
Témata:
acoustic radiation
Acoustics
Anatomy
Animal cognition
Auditory nerve
auditory pathways
Auditory system
auditory tract
Brain research
Cortex (auditory)
Cortex (somatosensory)
Cortex (temporal)
diffusion-based tractography
Information processing
Language
Mammals
Medial geniculate body
Monkeys & apes
Neuroscience
Neurosurgery
NMR
Nuclear magnetic resonance
Primates
sensory pathways
Studies
Substantia alba
Temporal gyrus
Temporal lobe
Thalamus
Topography
Italy
diffusion-based tractography
acoustic radiation
auditory system
auditory tract
sensory pathways
auditory pathways
ISSN:1662-5129, 1662-5129
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Shrnutí:The auditory system of mammals is dedicated to encoding, elaborating and transporting acoustic information from the auditory nerve to the auditory cortex. The acoustic radiation (AR) constitutes the thalamo-cortical projection of this system, conveying the auditory signals from the medial geniculate nucleus (MGN) of the thalamus to the transverse temporal gyrus on the superior temporal lobe. While representing one of the major sensory pathways of the primate brain, the currently available anatomical information of this white matter bundle is quite limited in humans, thus constituting a notable omission in clinical and general studies on auditory processing and language perception. Tracing procedures in humans have restricted applications, and the reconstruction of this bundle using diffusion tractography techniques remains challenging. Hence, a more accurate and reliable reconstruction of the AR is necessary for understanding the neurobiological substrates supporting audition and language processing mechanisms in both health and disease. This review aims to unite available information on the macroscopic anatomy and topography of the AR in humans and non-human primates. Particular attention is brought to the anatomical characteristics that make this bundle difficult to reconstruct using non-invasive techniques, such as diffusion-based tractography. Open questions in the field and possible future research directions are discussed.
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Edited by: Ricardo Insausti, University of Castilla La Mancha, Spain
Reviewed by: David Reser, Monash University, Australia; Hisayuki Ojima, Tokyo Medical and Dental University, Japan
ISSN:1662-5129
1662-5129
DOI:10.3389/fnana.2019.00027