Corticobulbar tract

Last revised by Leon Chau on 7 Jan 2022

Citation, DOI, disclosures and article data

Citation:

Sciacca F, Chau L, Murphy A, et al. Corticobulbar tract. Reference article, Radiopaedia.org (Accessed on 18 Apr 2024) https://doi.org/10.53347/rID-70519

DOI:

https://doi.org/10.53347/rID-70519

Permalink:

https://radiopaedia.org/articles/70519

rID:

70519

Article created:

24 Aug 2019, Francesco Sciacca ◉

Disclosures:

At the time the article was created Francesco Sciacca had no recorded disclosures.

View Francesco Sciacca's current disclosures

Last revised:

7 Jan 2022, Leon Chau ◈

Disclosures:

At the time the article was last revised Leon Chau had no recorded disclosures.

View Leon Chau's current disclosures

Revisions:

6 times, by 6 contributors - see full revision history and disclosures

Systems:

Central Nervous System

Sections:

Anatomy

Tags:

refs, stub, cases

Synonyms:

Corticonuclear tract

The corticobulbar (or corticonuclear) tract originates primarily in Brodmann area 4 and exits at the brainstem to synapse on the lower motor neurons of the cranial nerves bilaterally. The exception to this bilateral connection is the facial nerve and hypoglossal nerve. Innervation to the lower half of the face (via the facial nerve) and the tongue (via the hypoglossal nerve) is only contralateral.

The corticobulbar fibers pass through the corona radiata and run through the genu of the internal capsule into the brainstem ¹.

It is involved in the movement of the face, head and neck ².