What Innervates the anterior triangle?

Nerve supply Geniohyoid: by a branch from the hypoglossal nerve consisting of fibres from the C1 nerve. Sternohyoid, Omohyoid, Sternothyroid are supplied by Ansa cervicalis.

What Innervates anterior neck muscles?

The anterior scalene muscle is innervated by the anterior rami of the spinal nerves C4-C6, and vascularized by the ascending cervical branch of inferior thyroid artery.

Which nerve Innervates a major muscle in both the anterior and posterior triangles of the neck?

The spinal accessory nerve leaves the deep surface of the sternocleidomastoid muscle to enter the dorsal triangle of the neck, which it crosses to innervate the trapezius muscle.

What are the contents of the anterior triangle of the neck?


  • Pharynx.
  • Larynx.
  • Oesophagus.
  • Thyroid Gland.
  • Parathyroid Glands.

What is ANSA Cervicalis?

The ansa cervicalis is a neural loop in the neck formed by connecting the superior root from the cervical spinal nerves (C1–2) and the inferior root descending from C2–C3. It has various anatomical variations and can be an important acknowledgment in specific operations of the neck region.

What nerve Innervates the Platysma muscle?

the facial nerve
The platysma was most commonly innervated by the cervical branch of the facial nerve (38.2%) or the cervical branch and mandibular branch of the facial nerve (60.5%), followed by the cervical plexus (0.6%), the cervical motor nucleus (0.6%), and the glossopharyngeal nerve (0.1%).

What nerves are in the posterior triangle of the neck?

Posterior Triangle of the Neck

  • Trapezius Muscle.
  • Brachial Plexus.
  • Sternocleidomastoid Muscle.
  • Cervical Plexus.
  • Suprascapular Nerve.
  • Jugular Foramen.
  • Vagus Nerve.
  • Accessory Nerve.

Which important vascular structure bifurcates within the carotid triangle?

the common carotid artery
Important vascular structures are found within this triangle. It contains the bifurcation of the common carotid artery into internal and external carotid arteries. The internal carotid artery initially lies postero-laterally to the external carotid artery.

What nerve Innervates the platysma muscle?

What does C3 nerve supply?

Motor. On the other hand, the motor branches of the cervical plexus form the ansa cervicalis (C1-C3), which is a nerve loop innervating the infrahyoid muscles in the anterior cervical triangle. They also form the phrenic nerve (C3-C5) which supplies the diaphragm and the pericardium of the heart.