Mostración Cadavérica 2022 -Nuca

Anatomy of the Neck

In this section, the speaker introduces the anatomical structures of the neck, focusing on different muscle layers and their attachments.

Posterior View of the Neck

• The region of the neck is divided into superior, inferior, left, and right regions.

• This region is delimited superiorly by a line passing through the external occipital protuberance and inferiorly by a line passing through the spinous process of the seventh cervical vertebra.

Muscles of the Neck

• The first muscular layer encountered is the trapezius muscle.

• Trapezius inserts in the medial third of the nuchal line, ligamentum nuchae, and spinous processes of cervical vertebrae.

• The second muscular layer consists of muscles like splenius capitis.

• Splenius capitis originates from ligamentum nuchae and spinous processes extending superiorly and laterally.

• Moving deeper reveals muscles like semispinalis capitis.

• Semispinalis capitis inserts from ligamentum nuchae to lower cervical and upper thoracic vertebrae with fibers directed superiorly and laterally.

Deeper Muscle Layers

• Further exploration uncovers muscles such as levator scapulae.

• Levator scapulae elevates scapula at its superior angle with fibers ending at cervical vertebrae transverse processes.

• Delving into deeper planes reveals intricate muscles like rectus capitis posterior minor.

• Rectus capitis posterior minor attaches to atlas tubercle and extends medially towards occipital bone's inferior nuchal line.

New Section

In this section, the speaker discusses the importance of the fourth plane, focusing on the region of the neck and its topographical features.

Importance of Fourth Plane

• The speaker emphasizes the significance of the fourth plane extending to the transverse process at the back.

• Details about the topographical region known as the suboccipital triangle or Tilo's triangle are provided.

• Discussion on how to identify and outline a region practically by setting boundaries first and then mentioning its contents.

• Mention of structures passing through this triangle, such as the occipital nerve and vertebral artery.

New Section

This part delves into key nerves and arteries in the neck region, highlighting their pathways and relationships with surrounding muscles.

Nerves and Arteries in Neck Region

• Introduction to important nerves like the occipital nerve and its course relative to surrounding muscles.

• Description of how nerves pass through specific muscles from deep to superficial layers.

• Pathway of nerves through various muscle layers towards superficial regions like skin.

New Section

The focus shifts to a detailed examination of anatomical structures within the suboccipital triangle, emphasizing relationships between muscles, nerves, and arteries.

Anatomy of Suboccipital Triangle

• Detailed observation of muscle boundaries within the suboccipital triangle on both sides.

• Visual demonstration showing how arteries traverse through bony structures within triangles.