Genetic Basis of Polymorphism and Mutation @dr.chitrashumananatomy

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  NERVES OF UPPER LIMB – MEDIAN, ULNAR, RADIAL NERVES                               MEDIAN NERVE:   Root value: C5, C6, C7, C8, T1 It is formed in the axilla by the union of two roots – medial and lateral Formation in the axilla: Medial root is form medial cord of brachial plexus ( C8,T1) and lateral root is from lateral cord of brachial plexus ( C5,C6,C7) The medial root crosses the third part of axillary artery and joins with lateral root to form median nerve which is now lateral to the 3 rd part of axillary artery. v Course: In the front of arm In the cubital fossa In the front of forearm In the palm of hand In the front of arm: It runs lateral to third part of axillary artery and proximal part of brachial artery. In the middle of the arm, opposite the insertion of coracobrachialis, the median nerve crosses from lateral to...
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  LUNGS Lungs are paired organs of respiration invested by pulmonary pleura except at the hilum and the attachment of the pulmonary ligament. For dissection videos of the right and the left lungs- watch these videos: https://youtu.be/Ub4qyKph3Gs https://youtu.be/qQDlDQS_9kI For detailed video of the gross features of the lungs, watch this video: https://youtu.be/3vbYLAykuwI For video of bronchopulmonary segments, watch this video: https://youtu.be/c1_2nUUk7dk Presenting parts : Each lung is half conical shape and presents Apex and base Costal and medial surfaces Three borders – anterior, posterior and inferior Apex :  Apex is an area above the impression of the 1 st rib and its costal cartilage ( not a point) It is situated at the root of the neck Apex is covered by cervical pleura and by supra pleura; membrane. Relations of the apex : The relations are similar on both sides except on the medial side. Infront : Subclavian artery and vein with the scalenus anterior in betw...
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  CHAPTER 10 PALM OF HAND           The skin of the palm is thick and the superficial fascia contains palmaris brevis muscle across the base of hypothenar eminence. Deep fascia is thickened to form: Flexor retinaculum Palmar aponeurosis Fibrous flexor sheaths of digits Flexor retinaculum: It covers the anterior concave surface of the carpus into an osseo fibrous carpal tunnel Attachments: Medially – pisiform bone and  hook of the hamate Laterally - tubercle of scaphoid and the crest of trapezium Structures passing superficial to flexor retinaculum: Palmaris longus tendon Palmar cutaneous branch of median nerve Palmar cutaneous branch of ulnar nerve Superficial palmar branch of radial artery Ulnar nerve and ulnar vessels In between superficial and deep slips on the lateral distal part, flexor carpi radialis tendon passes. Structures passing deep to flexor retinaculum: Median nerve Tendons of flex...
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