ANAT 2626 Midterm Exam - Comprehensive Review

ANAT 2626 Midterm Exam - Comprehensive Review - Neck Major...

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Neck Major conduit for structures passing between the cranium and trunk Larynx, thyroid gland, and parathyroid glands Main aterial blood flow to the head and neck (The common carotid arteries) and the principal venous drainage (the jugular veins) lie anterolaterally in the neck Thyroid Cartilage lies in the middle of the anterior aspect of the neck o Largest of the cartilages of the larynx and trachea Bones 1. 7 Cervical Vertebrae 2. 4 typical cervical vertebrae 3-6 a. Superior surface is concave b. Inferior surface is convex c. Vertebral foramen is large and triangular d. Vertebral artery and vertebral vein; except c7 run through the transverse foramen 3. Atypical Cervical Vertebrae a. Atlas b. Axis c. C7 Hyoid Bones Lies in the anterior neck at the level of C3 Between the mandible and thyroid cartilage Does not articulate with any other bone Suspended from the styloid process of the temporal bones by the styloidhyoid ligaments and is firmly bound to the thyroid cartilage Functionally serves as attachment for anterior neck muscles and prop to keep the airway open Fascia of the Neck 1. Superficial Cervical Fascia a. Lies between skin and investing layer of deep cervical fascia b. Contains Platysma 2. Deep Cervical Fascia I. Investing Fascia 1. Thickest Layer 2. Surrounds a. Trapezius b. Sternocleidomastoid c. Submandibular Gland d. Partoid Gland 3. Suprasternal Space- encloses the inferior ends of the anterior jugular veins
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4. Continues with Nuchal ligament II. Pretracheal layer of the deep cervical fascia 1. Extends from the hyoid into the thorax 2. blends with the pericardium covering of the heart and carotid sheath 3. Muscular Part: encloses the infrahyoid muscles 4. Visceral Part: encloses the thyroid gland, trachea, and esophagus III. Prevertebrl Layer of the deep cervical fascia 1. Sheths the vertebral column a. Longus Colli b. Longus Capitis Anteriorly c. Scalenes laterally 2. Fuses with the Anterior Longitudinal Ligament Carotid Sheath Extends from the cranial base to the root of the neck Blends anteriorly with the investing fascia and pretracheal layers of fascia And posteriorly with the prevertenral layer of fascia Contains the Common Carotid arteries, Vagus, and internal jugular veins Retropharyngeal Space “Danger Space #4” Largest and most important interfascial space in the neck Permits movement of the pharynx, esophagus, larynx, and trachea relative to the vertebral column during swallowing. Platysma Muscle of facial expression-convery tension and stress Innvervated by the facial nerve Derived from mesenchyme in the 2 nd pharyngeal arch Sternocleiodmastoid Produces movement at the craniovertebral joints or the vervical intervertebral joints Innverated by Spinal Accessory Nerve Posterior Cervical Region Trapezius Skin is innerveated by the posterior Rami of Cervical Spinal Nerves
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Lateral Cervical Region Occiptial Triangle o Occipital artery appears in the apex
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ANAT 2626 Midterm Exam - Comprehensive Review - Neck Major...

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