Anatomy of Cervical Spine Joints
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Questions and Answers

Which nerve innervates the posterior belly of the digastric muscle?

Facial nerve

What nerve innervates the anterior belly of the digastric muscle?

Inferior alveolar nerve

Where does the mylohyoid muscle originate?

Mylohyoid line of the mandible

What action does the geniohyoid muscle perform?

<p>Depresses the mandible and elevates the hyoid bone</p> Signup and view all the answers

Which nerve innervates the geniohyoid muscle?

<p>C1 nerve roots within the hypoglossal nerve</p> Signup and view all the answers

What is the arterial supply to the infrahyoid muscles?

<p>Superior and inferior thyroid arteries</p> Signup and view all the answers

What is the action of the sternohyoid muscle?

<p>Depresses the hyoid bone</p> Signup and view all the answers

Which nerve innervates the scalene muscles?

<p>Anterior rami of C5-C6</p> Signup and view all the answers

Where does the thyrohyoid muscle originate from?

<p>Thyroid cartilage of the larynx</p> Signup and view all the answers

What is the function of the anterior scalene muscle?

<p>Elevation of the first rib</p> Signup and view all the answers

Which muscles converge into one large belly that inserts into the first rib?

<p>Middle scalene</p> Signup and view all the answers

What happens when the hyoid bone is fixed and the thyrohyoid muscle contracts?

<p>Can elevate the larynx</p> Signup and view all the answers

What is the origin of Rectus Capitis Posterior Minor muscle?

<p>Posterior tubercle of C1 vertebra</p> Signup and view all the answers

Which nerve innervates Obliquus Capitis Superior muscle?

<p>Suboccipital nerve (posterior ramus of C1)</p> Signup and view all the answers

Where does Stylohyoid muscle insert?

<p>Lateral aspect of the hyoid bone</p> Signup and view all the answers

What action does Digastric muscle perform?

<p>Depresses the mandible and elevates the hyoid bone</p> Signup and view all the answers

What is the innervation of Stylohyoid muscle?

<p>Stylohyoid branch of the facial nerve (CN VII)</p> Signup and view all the answers

Where does Obliquus Capitis Superior muscle insert?

<p>Occipital bone (between the superior and inferior nuchal lines)</p> Signup and view all the answers

What type of joint connects adjacent vertebral bodies in the cervical spine?

<p>Symphysis</p> Signup and view all the answers

Which muscles are situated underneath the occipital bone and are responsible for extension and rotation of the head?

<p>Suboccipital muscles</p> Signup and view all the answers

What type of joint permits flexion at the head between the superior facets of the lateral masse of the atlas and the occipital condyles?

<p>Condyloid type synovial joint</p> Signup and view all the answers

Which nerve innervates the Suboccipital muscles, including Rectus Capitis Posterior Major and Obliquus Capitis Inferior?

<p>Suboccipital nerve (posterior ramus of C1)</p> Signup and view all the answers

What is the origin of Obliquus Capitis Inferior muscle?

<p>Spinous process of the C2 vertebra</p> Signup and view all the answers

Which joints are unique to the cervical spine anatomy?

<p>Atlantoaxial and atlantooccipital joint</p> Signup and view all the answers

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