Difference between revisions of "Hyoid Apparatus - Anatomy & Physiology"

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==Introduction==
 
==Introduction==
  
The hyoid apparatus holds the [[Larynx - Anatomy & Physiology|larynx]] in place and supports the [[Pharynx - Antomy & Physiology|pharynx]] and [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] from the skull.
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The hyoid apparatus holds the [[Larynx - Anatomy & Physiology|larynx]] in place and supports the [[Pharynx - Anatomy & Physiology|pharynx]] and [[Oral Cavity - Tongue - Anatomy & Physiology|tongue]] from the skull.
  
 
It is made up of 5 different bones which vary in length and size depending on the species.
 
It is made up of 5 different bones which vary in length and size depending on the species.

Revision as of 14:13, 29 July 2008

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Introduction

The hyoid apparatus holds the larynx in place and supports the pharynx and tongue from the skull.

It is made up of 5 different bones which vary in length and size depending on the species.

Structure and Function

  • Attached to the temporal region of the skull
  • Visible when the pharynx is viewed through the mouth
  • Basihyoid is palpable within the intermandibular space
  • Sternohyoid muscle pulls hyoid caudally
  • Geniohyoid muscle pulls hyoid rostrally

The hyoid bones

  • Basihyoid
    • Lingual process present in some species which protrudes into the roof of the tongue
  • Epihyoid
  • Keratohyoid
  • Thyrohyoid

Species Differences

Carnivores

  • Stylohyoid bones not palpable

Equine

  • Epihyoid small

Ruminants

  • Lingual process present

Porcine

  • Lingual process present

Links