Palm of Hand Flashcards
Palmar Aponeurosis
What is the thickened area of deep fascia into which the palmaris longus attaches
Flexor Retinaculum (transverse carpal ligament)
What structure is a moderate thickening of the antebrachial fascia that surrounds the muscles of the forearm. The underlying flexor retinaculum (transverse carpal ligament) is a dense, tough band of connective tissue continuous with the antebrachial fascia. It extends from the pisiform and hamate medially to the scaphoid and trapezium laterally, thus forming the carpal tunnel.
Thenar Muscles
Recurrent Branch of the median nerve.
What are the muscles of the anterior thumb? Supplied by the recurrent branch of the median nerve.
Hypothenar Muscles
What muscles supplie the anteriomedial palm of hand? They are innervated by the ulnar nerve.
Dorsal branch of the Ulnar Nerve
Superficial Branch of the Radial Nerve
What Nerve passes distally beneath the brachioradialis muscle becomes superficial in the distal forearm and receives cutaneous sensory information from the radial side of the dorsal hand and three and one-half digits?
What nerve becomes superficial in the distal forearm and receives cutaneous sensory information from the ulnar side of the dorsal hand and one and one-half digits?
Superficial Palmar arterial arch
Common Palmar Digital Arteries
Proper Palmar Digital Arteries
What artery(s) is found immediately beneath the palmar aponeurosis. The major contributor to the arch is the ulnar artery. The ulnar artery passes lateral to the pisiform bone along with the ulnar nerve to enter the palm of the hand. It gives rise to the common palmar digital arteries and then near the web of the digits gives rise to the proper palmar digital arteries that continue distally to the finger tips.
Fibrous Digital Sheaths
Synovial Digital Sheaths
The tendons of the flexor digitorum superficialis and profundus are held in place over the digits by the fibrous digital sheaths, inside of which are the synovial digital sheaths. The tendons to the fifth digit are enclosed by the synovial membrane of the ulnar bursa, while the flexor pollicis longus is enclosed in the synovial membrane of the radial bursa.
Vincula
The vincula are connective tissue bundles that extend from the tendons of the flexor digitorum muscle to the periosteum of the bone. It is thought to carry a blood supply from the bone to the tendons
Lubrical Muscles
What muscles take origin from the deep extensor tendons, and their tendons pass on the radial side of the metacarpal-phalangeal joint (MP joint) to insert into the extensor hood. Lumbricals 1 and 2 are innervated by the median nerve, while lumbricals 3 and 4 are innervated by the ulnar nerve. The lumbricals flex the MP joint and extend the PIP and DIP joints by acting through the extensor hood.
Adductor Pollicis Muscle
Palmar Interossei Muscle
What muscle takes origin deep in the hand from the second and third metacarpal bones and adjacent carpal bone and inserts on the medial side of the base of the proximal phalanx of the thumb. It is innervated by the deep branch of the ulnar nerve.
What muscles are found between the metacarpal bones and serve as adductors of the digits. Like the adductor pollicis, they are innervated by the ulnar nerve.
Deep Palmar Arterial Arch
The deep palmar arch is a continuation of the deep branch of the radial artery. Note that the radial artery has a palmar branch that is continuous with the superficial palmar artery derived mainly from the ulnar artery. The deep palmar arterial arch sends arterial branches that communicate with the common palmar digital arteries
Digital Branches of the median nerve
Digital Branches of the Ulnar Nerve
Flexor Pollicis Longus
Flexor Digitorum Superficialis
What tendon terminates at the base of the distal phalanx of the thumb?
What tendons split over the body of the proximal phalanx and inserts into the base of the middle phalanx?
Flexor Pollicis Longus
Flexor Digitorum Profundus
What tendons pass through the split in the tendons of the flexor digitorum superficialis and continue distally to insert into the base of the distal phalanx.
Flexor Digitorum Superficialis termination
Flexor Digiorum Profundus termination
Flexor Pollicis Longus termination
What tendons pass through the split in the tendons of the flexor digitorum superficialis and continue distally to insert into the base of the distal phalanx.
What is the thickened area of deep fascia into which the palmaris longus attaches
Palmar Aponeurosis
What structure is a moderate thickening of the antebrachial fascia that surrounds the muscles of the forearm. The underlying flexor retinaculum (transverse carpal ligament) is a dense, tough band of connective tissue continuous with the antebrachial fascia. It extends from the pisiform and hamate medially to the scaphoid and trapezium laterally, thus forming the carpal tunnel.
Flexor Retinaculum (transverse carpal ligament)
What are the muscles of the anterior thumb? Supplied by the recurrent branch of the median nerve.
Thenar Muscles
Recurrent Branch of the median nerve.
What muscles supplie the anteriomedial palm of hand? They are innervated by the ulnar nerve.
Hypothenar Muscles
What Nerve passes distally beneath the brachioradialis muscle becomes superficial in the distal forearm and receives cutaneous sensory information from the radial side of the dorsal hand and three and one-half digits?
What nerve becomes superficial in the distal forearm and receives cutaneous sensory information from the ulnar side of the dorsal hand and one and one-half digits?
Dorsal branch of the Ulnar Nerve
Superficial Branch of the Radial Nerve
What artery(s) is found immediately beneath the palmar aponeurosis. The major contributor to the arch is the ulnar artery. The ulnar artery passes lateral to the pisiform bone along with the ulnar nerve to enter the palm of the hand. It gives rise to the common palmar digital arteries and then near the web of the digits gives rise to the proper palmar digital arteries that continue distally to the finger tips.
Superficial Palmar arterial arch
Common Palmar Digital Arteries
Proper Palmar Digital Arteries
The tendons of the flexor digitorum superficialis and profundus are held in place over the digits by the fibrous digital sheaths, inside of which are the synovial digital sheaths. The tendons to the fifth digit are enclosed by the synovial membrane of the ulnar bursa, while the flexor pollicis longus is enclosed in the synovial membrane of the radial bursa.
Fibrous Digital Sheaths
Synovial Digital Sheaths
