Afferent nerves, such as sensory nerves, carry impulses towards the central nervous system. 

autosomal dominant

A genetic mutation inherited from at least one parent whereby one of the two alleles for a gene mutated and will override the normal allele to cause expression of the mutant phenotype.

branchial arches

Otherwise known as the pharyngeal arches, include six arches that during development give rise to specialised structures of the head and neck in vertebrates.


A condition present at birth, this may be genetically inherited or a defect of development.

corticonuclear fibres

Coriconuclear fibres are fibres running from a cortical structure, either the cerebrum or cerebellum towards a subcortical cell group.


An efferent nerve, such as a motor nerve, carries impulses away from the central nervous system, towards its target tissue.


A foramen is a hole in the base of the skull. There are many foramina, which blood vessels and nerves pass through to exit or enter the skull.


  A mass of nervous tissue contain neuronal cell bodies.


The sense of taste.  The main taste organ is the tongue.


Gyri are the ridges on the surface of the brain.
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