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Larynx - Anatomy & Physiology (view source)
Revision as of 08:37, 29 July 2008
, 08:37, 29 July 2008no edit summary
===Intrinsic Musculature===
===Intrinsic Musculature===
*Cricothryroideus
*Cricothryroid muscle
**Innervated by the cranial laryngeal nerve a branch of the vagus nerve ([[Nervous System - CNS - Anatomy & Physiology#Innervation - Cranial Nerves|CN X]])
**Moves cricoid and arytenoid cartilages caudally
**Tenses vocal folds
*Dorsal cricoarytenoid muscle
**Dorsal surface of cricoid cartilage to arytenoid cartilage
**Abducts vocal process and therefore vocal fold
**Widens glottis
*Lateral cricoidarytenoid muscle
**Adducts vocal processes
**Narrows the glottis
*Thyroarytenoid muscle
**Laryngeal floor to the thyroid cartilage and arytenoid cartilage
**Alters the tension of the vocal and vestibular folds
**Forms part of the sphincter muscular arrangement
*Transverse arytenoid muscle
**Completes the muscular sphincter arrangment
*Spans the arytenoid cartilages
==Vasculature==
==Vasculature==
*
*Branches of the vagus nerve ([[Nervous System - CNS - Anatomy & Physiology#Innervation - Cranial Nerves|CN X]])
**Cranial larygeal nerve
**Caudal (recurrent) laryngeal nerve
==Innervation==
==Innervation==
===Equine===
===Equine===
*Fusion of the two plates of the thyroid cartilage is least extensive forming a rostral pointing notch which is a good site for surgical entry into the larynx
*Fusion of the two plates of the thyroid cartilage is least extensive forming a rostral pointing notch which is a good site for surgical entry into the larynx
*Thyroarytenoid muscle is divided into 2 parts- rostral and caudal vocalis which are situated within the vocal folds and vestibular folds
===Canine===
*Thyroarytenoid muscle is divided into 2 parts- rostral and caudal vocalis which are situated within the vocal folds and vestibular folds
==Links==
==Links==