moina of the neck

• What is the origin of the Platysma muscle?

  Deep fascia over pectoralis major and deltoid
• What is the insertion point of the Platysma muscle?

  Body of mandible and angle of mouth
• Which nerve supplies the Platysma muscle?

  Facial nerve cervical branch
• What is the action of the Platysma muscle?

  Depresses mandible and angle of mouth
• What is the origin of the Sternocleidomastoid muscle?

  Manubrium sterni and medial third of clavicle
• What is the insertion point of the Sternocleidomastoid muscle?


  Mastoid process of temporal bone and occipital bone
• Which nerves supply the Sternocleidomastoid muscle?

  Spinal part of accessory nerve and C2 and C3
• What are the actions of the Sternocleidomastoid muscle when both muscles act together?

  Extend head and flex neck
• What is the action of one Sternocleidomastoid muscle?


  Rotates head to opposite side
• What is the origin of the posterior belly of the Digastric muscle?

  Mastoid process of temporal bone
• What is the insertion point of the posterior belly of the Digastric muscle?

  Intermediate tendon held to hyoid by fascial sling
• Which nerve supplies the posterior belly of the Digastric muscle?

  Facial nerve
• What is the action of the posterior belly of the Digastric muscle?

  Depresses mandible or elevates hyoid bone
• What is the origin of the anterior belly of the Digastric muscle?

  Body of mandible
• Which nerve supplies the anterior belly of the Digastric muscle?

  Nerve to mylohyoid
• What is the origin of the Stylohyoid muscle?

  Styloid process
• What is the insertion point of the Stylohyoid muscle?

  Body of hyoid bone
• Which nerve supplies the Stylohyoid muscle?

  Facial nerve
• What is the action of the Stylohyoid muscle?

  Elevates hyoid bone
• What is the origin of the Mylohyoid muscle?

  Mylohyoid line of body of mandible
• What is the insertion point of the Mylohyoid muscle?


  Body of hyoid bone and fibrous raphe
• Which nerve supplies the Mylohyoid muscle?

  Inferior alveolar nerve
• What is the action of the Mylohyoid muscle?

  Elevates floor of mouth and hyoid bone or depresses mandible
• What is the origin of the Geniohyoid muscle?

  Inferior mental spine of mandible
• What is the insertion point of the Geniohyoid muscle?

  Body of hyoid bone
• Which nerve supplies the Geniohyoid muscle?

  First cervical nerve
• What is the action of the Geniohyoid muscle?

  Elevates hyoid bone or depresses mandible
• What is the origin of the Sternohyoid muscle?

  Manubrium sterni and clavicle
• What is the insertion point of the Sternohyoid muscle?

  Body of hyoid bone
• Which nerve supplies the Sternohyoid muscle?

  Ansa cervicalis; C1, 2, and 3
• What is the action of the Sternohyoid muscle?

  Depresses hyoid bone
• What is the origin of the Sternothyroid muscle?

  Manubrium sterni
• What is the insertion point of the Sternothyroid muscle?

  Oblique line on lamina of thyroid cartilage
• Which nerve supplies the Sternothyroid muscle?

  Ansa cervicalis; C1, 2, and 3
• What is the action of the Sternothyroid muscle?

  Depresses larynx
• What is the origin of the Thyrohyoid muscle?

  Oblique line on lamina of thyroid cartilage
• What is the insertion point of the Thyrohyoid muscle?

  Lower border of body of hyoid bone
• Which nerve supplies the Thyrohyoid muscle?

  First cervical nerve
• What is the action of the Thyrohyoid muscle?

  Depresses hyoid bone or elevates larynx
• What is the origin of the inferior belly of the Omohyoid muscle?


  Upper margin of scapula and suprascapular ligament