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 colli anterior. 

 To pull the head downward : 

 Together 



Rectus capitis lateralis, 

 Trachelo-mastoideus . 



To pull 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: 



Thy reo-ary tenoideus . 

 To approximate the trachea! rings: 



Tracheo-lateralis. 

 To tense the inferior larynx: 

 Broncho-trachealis posticus, 

 Broncho-trachealis anticus 

 Broncho-trachealis brevis, 

 Bronchialis posticus, 

 Bronchialis anticus. 



