130 ANATOMY OF THE DOMESTIC FOWL 



To depress the tip of the tongue and elevate the base: 



Depressor glottis. 

 To elevate the hyoid arches: 



Cerato-glossus. 

 To extend the head : 

 Complexus, 



Rectus capitis anticus minor. 

 To flex the head upon the neck: 



Flexor capitis inferior. 

 To extend the head on the neck and elevate the neck : 



Biventer cervicis. 

 To raise the neck upward: 

 Longus colli posticus. 

 To flex each vertebra on the preceding or succeeding laterally: 

 Obliquus colli, 

 Intertransversales. 

 To pull the neck downward: 



Longus coUi anterior. 

 To puU the head downward: 

 Together — 



Rectus capitis lateralis, 

 Trachelo-mastoideus. 

 To puU the head downward and to one side : 

 Singly— 



Rectus capitis lateralis, 

 Trachelo-mastoideus. 

 To approximate the spinous processes of the vertebrae. 



Interspinales. 

 To approximate the vertebrae in a supero-lateral direction: 



Interarticulares. 

 To flex the vertebrae supero-laterally : 



Obliquo-transversales. 

 To extend the neck: 



Together when the first rib is fixed — 

 Scalenus medius. 

 To close the glottis: 



Constrictor glottidis. 

 To open the glottis: 



Thyreo-ary tenoideus . 

 To approximate the tracheal rings: 



Tracheo-lateralis. 

 To tense the inferior larynx: 

 Broncho-trachealis posticus, 

 Broncho-trachealis anticus 

 Broncho-trachealis brevis, 

 Bronchialis posticus, 

 Bronchialis anticus. 



