Basic sign language linguistics
The mediums of spoken language and signed languages are quite contrast: vocal-aural and visual-spatial, respectively. Yet, every feature in linguistics is also found in signed language. Furthermore, neuroscience studies show that both function in the same linguistic-specific regions of the brain!
In other word, language is not central to speech.
Learn about the language structure of American Sign Language from the smallest units of language (phonology) to the full-fledged structure of language and how it is used in social settings (sociolinguistics).
Phonology: the study of the smallest units of language, how these units are combined to form a word.
Morphology: the study of the formation and inflection of words (or morphemes).
Morpheme: the smallest meaningful unit of a language. It's composed of phonemes or parameters, the smallest units of sound or visue respectively.
Semantics: the study of meaning.
Syntax: the study of sentence structure in a language.
Grammar: the system of structural rules which describes how words combine with each other to form sentences.
Sociolinguistics: the study of relationship of language and social structure, and linguistic variation.
Phonetics: the study of articulation; how they are articulated and how they are perceived and their physical properties.