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. Author manuscript; available in PMC: 2019 Nov 7.
Published in final edited form as: Neuron. 2018 Nov 7;100(3):534–549. doi: 10.1016/j.neuron.2018.10.026

Figure 2:

Figure 2:

Simplified rendition of the LSO circuit. The trapezoid body (TB) and lateral lemniscus (LL) are fiber bundles containing some of the relevant axons. Besides the calyx of Held on cell bodies of MNTB neurons, the circuit also features large axosomatic terminals on spherical bushy cells (SBCs) and globular bushy cells (GBCs) of the cochlear nucleus (CN), referred to as the endbulbs and modified endbulbs of Held. Red color indicates inhibitory (glycinergic) projection. The LSO contains several cell types: the projection to the contralateral inferior colliculus (IC) is excitatory while that to the ipsilateral IC is mixed excitatory and inhibitory (dashed red line, for ease shown as if originating from same neuron).