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Hand and Wrist Anatomy PowerPoint Presentation

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Description : Check out this medical PowerPoint presentation titled "Hand and Wrist Anatomy” by Dr. Saeed Vohra and Dr. Jamila El-Medany.

This medical PowerPoint presentation is about the hand and wrist, complex structures that allow for a wide range of movements and functions. The hand is composed of 27 bones, while the wrist is made up of eight small bones called carpals. The bones of the hand are divided into three groups viz., Carpals, Metacarpals, and Phalanges.

The hand and wrist also contain a number of ligaments, tendons, muscles, nerves, and blood vessels that work together to allow for movement, sensation, and dexterity. The muscles in the hand and wrist are responsible for controlling the movement of the fingers and thumb, while the nerves provide sensation to the hand and allow for communication between the brain and the hand. The blood vessels in the hand and wrist provide oxygen and nutrients to the tissues of the hand, while the ligaments and tendons help to stabilize the joints and allow for smooth movement.

Tags : Hand and Wrist Anatomy, Carpals, Metacarpals, Phalanges, Hand Surgery, Hand Surgery PowerPoint presentation

Published on : May 29, 2023 | Views : 1269 | Downloads : 3

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Slide 1-

Dr. Saeed Vohra Dr. Jamila El-Medany HAND & WRIST
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OBJECTIVES At the end of the lecture, students should be able to: Describe the anatomy of the deep fascia of the wrist & hand (flexor & extensor retinaculae & palmar aponeurosis). List the structures passing superficial & deep to flexor retinaculum. Describe the anatomy of the insertion of long flexor & extensor tendons. Describe the anatomy of the small muscles of the hand (origin, insertion action & nerve supply)
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Retinacula Flexor & Extensor Retinaculua: Bands of Deep Fascia in front & back of Wrist Function: They Hold the long flexor and extensor tendons at the wrist in position. Attachments: Medially: Both retinacula attached to Pisiform & Hook of Hamate. Laterally: Flexor Retinaculum attached to Tubercle of Scaphoid & Trapezium. Extensor Retinaculum attached to Distal end of Radius
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From Medial to Lateral Tendon of Flexor carpi ulnaris. Ulnar nerve. Ulnar artery. Palmar cutaneous branch of ulnar nerve. Tendon of Palmaris longus. Palmar cutaneous branch of median nerve. Structures Superficial to Flexor Retinaculum
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Carpal Tunnel Formed from Concave anterior surface of the Carpus covered by Flexor Retinaculum Contents From Medial to Lateral Tendons of flexor digitorum superficialis & profundus Median nerve Flexor Pollicis Longus (Flexor carpi radialis)
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Carpal Tunnel Syndrome Causes : Compression of the median nerve within the carpal tunnel Manifestations: 1. Burning pain (pins and needles ) in the lateral three and half fingers. No paresthesia over the thenar eminence?
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Carpal Tunnel Syndrome 2. Weakness or atrophy of the thenar muscles (Ape Hand). Inability to Oppose the thumb. N
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Palmar Aponeurosis The Thickened deep fascia of the Palm. It is Triangular in shape , occupies the central area of the palm. Apex: Attached to the distal border of flexor retinaculum and receives the insertion of palmaris longus. Base: Divides at the bases of the fingers into four slips that pass into the fingers. Functions: 1. Firmly attached to the overlying skin and improves the grip. 2. Protects the underlying tendons, vessels & nerves. 3. Gives origin to palmaris brevis muscle.
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Palmaris Brevis
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Short Muscles of Thumb & Little Finger
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Hypothenar Eminence (3)
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Thenar Eminence (3)
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Adductor Pollicis
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Movements of Thumb
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Insertion of Flexor Dig Superficialis & Profundus Flexor dig superficialis Each tendon: Divides into two halves & pass around the Profundus Tendon. The two halves Meet on the posterior aspect of Profundus tendon (partial decussation of fibers). Reunion of the two halves. Further Division into two slips attached to the Borders of Middle Phalanx. Flexor dig Profundus Inserted into the Base of the Distal Phalanx.
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Fibrous Flexor (Digital) Sheath A Strong Fibrous Sheath, which covers the anterior surface of the fingers and attached to the sides of the phalanges. Its Proximal end is opened Its Distal end is closed The Sheath with the anterior surfaces of the phalanges & the interphalangeal joints form an Osteofibrous blind Tunnel for the long flexor tendons of the fingers.
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Synovial Flexor Sheaths Common Synovial sheath (Ulnar Bursa) Contains tendons of Flexor Digitorum Superficialis & Profundus The Medial part of the sheath extends distally (without interruption) on the tendons of the little finger. The Lateral part of the sheath stops on the middle of the palm. The distal ends of the long flexor tendons to(Index, Middle & Ring) fingers acquire Digital Synovila Sheaths.
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Synovial Flexor Sheaths Flexor Pollicis Longus tendon has its own synovial sheath (Radial Bursa) Function of Synovial Sheaths: They allow the long tendons to move smoothly with a minimum of friction beneath the flexor retinaculum and the fibrous flexor sheaths.
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Lumbrical Muscles (4) Action: Flex metacarpophalangeal joints and extend interphalangeal joints of fingers Except thumb
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Palmar Interossei (4) 2 3 4 1 2 4 3 Action: Adduction of fingers toward center of the 3rd one.
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Dorsal Interossei (4) 1 2 3 4 AB AB Action: Abduction of fingers away from the 3rd one.
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Action of Lumbricals & Interossei Writing position
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Extensor Expansion Formed from the expansion of the tendons of extensor dig. at the PIJ, The tendon splits into three parts: One Central: inserted into the base of Middle phalanx. Two laterals: inserted into the base of the Distal phalanx. The Expansion Receives the insertions of: Corresponding Interosseous muscle (on each side). Lumbrical muscle (on the lateral side).
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Thank You