607251940-Muscle-of-Neck-Anatomy-PPt-L-pptx-Priti.pptx

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1. MUSCLES OF NECK – Priti nishad Bsc.OTAT

2. Introduction Sterno cleidomastaid muscle Platysma muscle Trapezius muscle Splenius capitis muscle Middle scalene muscle Scalenus anterior muscle Levator scapula muscle Longus capitis muscle Longus colli muscle Mylohyaid muscle Thyrohyoid muscle

3. Sterno-Cleidomastoid muscle Origin: Manubrium and medial portion of the clavicle Insertion: Mastoid process of the Temporal bone superior nuchal line Action: On fixation of the insertion,the muscle Act as accessory muscle of inspiration

4. Sterno-Cleidomastoid muscle

5. Platysma muscle •Origin: Deep fascia of the upper part Thorax •Insertion: Lower boarder of the mandible •Action: Depression of the mandible • Nerve supply Cervucle branch of facial Nerve

6. Platysma muscle

7. Trapezius muscle •Origin: Medial third of superior nuchal line,external occipital protuberance,ligamentum,nuchae,7th cervical spine all the thoracic spines. •Insertion: Lateral third of clavicle, acromion process of spine of scapula. •Action: •musles extend the neck • upper fibres of one side lateral flex the neck. • Nerve supply: Spinal accessory nerve motor and C3,4 propriocieptive.

8. Trapezius muscle

9. Splenius capitis muscle •Origin: Upper four thoracic spine. Lowe part of ligamentum nuchae. •Insertion: Mastroid process and Outer parts of superior nuchal line. •Action: Extension of the neck. •Nerve supply: Segmental innervation of spinal nerves.

10. Splenius capitis muscle

11. Middle scalene Muscle •Origin: Transverse process of lower six Cervucle vertebrae (2-7). •Insertion: Upper surface of the first rib. •Action: Elevation of the first rib and lateral flixation of the neck. •Nerve supply: Segmental from the ventral Rami of cervical nerve.

12. Middle scalene muscle

13. Scalenus anterior muscle •Origin: transverse process of thypical cervical vertebrae (3-6). •Insertion: Scalene tubercle of the first rib •Action: Elevation of first rib and lateral flexion the neck •Nerve supply: Segmental From the ventral rami of 4th,5 th and 6 th cervical nerves.

14. Scalenus anterior muscle

15. Levator scapula muscle •Origin: transverse process of upper four cervical vertebrae •Insertion: Upper part of medial border of scapula •Action: Elevation of scapula •Nerves supply: C3,4 and dorsal scapula nerve (C5).

16. Levator scapula muscle

17. Longus capitis muscule •Origin: Anterior tubercle of transverse process of C3,C6. •Insertion: Basilar part of occipital bone. •Innervation: Anterior Rami of spinal nerve C1-C3. •Action: Bilateral contraction – head flexion; Unilateral contraction – head rotation. •Blood supply: Ascending cervical artery and the inferior thyroid artery.

18. Longus colli muscle •Origin: Transverse processes of C5 To T3 •Insertion: Anterior arch of the atlas •Action: Flexes the neck and head •Innervation: Anterior Rami of spinal nerve C2-C6 •Blood supply: Branches of the vertebral,ascending pharyngeal and inferior thyroid arteries

19. Mylohyoid muscle •Origin: Mylohyoid line ( mandilble. •Insertion : body of hyoid bone and median ridge. •Action: raises oral cavity floor.elevates hyoid,elevates tongue, depresses mandible. •Nerve supply: mylohyoid nerve, from inferior alveolar branch of mandibular nerve.

20. Thyrohyoid Muscle •Origin: Angles of thyroid cartilage and adjacent cricothyroid ligament. •Insertion: Anterolateral surface of arytenoid cartilage • Innervation: Inferior laryngeal nerve(of recurrent laryngeal nerve(CN X) •Action: Draws arytenoid cartilage anteriorly,relaxes vocal ligament. •Blood supply: Laryngeal branches of superior and inferior thyroid arteries

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