Arches of the hand: distal transverse, longitudinal and oblique. Together, the three arches form the slightly concave postural base for the hand due to the underlying muscle tone which assists in object contact during prehensile movement. Thus, there is a slight palmar concavity even when the hand is ‘flat’.
What is palmar arch?
Medical Definition of palmar arch : either of two loops of blood vessels in the palm of the hand: a : a deeply situated transverse artery that is composed of the terminal part of the radial artery joined to a branch of the ulnar artery and that supplies principally the deep muscles of the hand, thumb, and index finger.
What is the function of the longitudinal arch of the hand?
The longitudinal arch of the hand follows the general shape of the second and third rays. These relatively rigid articulations provide an important element of longitudinal stability to the hand.
What is the most rigid arch of the hand?
Compared to the carpal arches, the arch formed by the distal ends of the metacarpal bones is flexible due to the mobility of the peripheral metacarpals (thumb and little finger). As these two metacarpals approach each other, the palmar gutter deepens. The central-most metacarpal (middle finger) is the most rigid.
Where is the transverse arch?
The transverse arch is located in the coronal plane of the foot. It is formed by the metatarsal bases, the cuboid and the three cuneiform bones.
What is Prehension of the hand?
Prehension involves moving the hand to an object, a coincident shaping of the hand in anticipation of the object, and a final closing of the fingers to formulate the grasp.
What is palmaris brevis?
Palmaris Brevis – Physiopedia Description Palmaris Brevis is a small cutaneous muscle that lies in the fascia over the hypothenar eminence.[1] Origin It originates from the flexor retinaculum and palmar aponeurosis.[2] Insertion It inserts on the skin of the medial border of the hand.[2] Nerve The Palmaris Brevis is …
What is the back of the hand called?
dorsal side The front, or palm-side, of the hand is referred to as the palmar side. The back of the hand is called the dorsal side.
Where is your palmar?
A single palmar crease is a single line that runs across the palm of the hand. People most often have 3 creases in their palms. The crease is most often referred to as a single palmar crease.
What is the foot’s function?
The feet are flexible structures of bones, joints, muscles, and soft tissues that let us stand upright and perform activities like walking, running, and jumping.
How many ligaments are in the hand?
Hand Anatomy. The human hand is made up of the wrist, palm, and fingers and consists of 27 bones, 27 joints, 34 muscles, over 100 ligaments and tendons, and many blood vessels and nerves.
What are the three arches of the hand and what is the importance of these during the gripping of an object?
The hand has a proximal transverse arch, a distal transverse arch, and a longitudinal arch. These allow the hand to conform to objects being held. These arches maximize the amount of surface contact between the hand and object, which enhances stability and increases sensory input.
What are the normal arches of the hand?
In your hand there are three main arches, two transverse and one longitudinal arch. One arch is rigid, but the other two are flexible and are maintained by the use of those tiny muscles in your hand. You can see the shape of your arches by touching thumb to index finger or thumb to little finger.
What are phalanges?
The phalanges (single: phalanx) of the hands are the tubular bones of the fingers and thumb. The second to fifth fingers each contain a proximal, middle and distal phalanx whereas the thumb only contains a proximal and distal phalanx.
What is the head of the metacarpal?
The heads of the metacarpals are bulbous and cam shaped, thereby permitting adduction, abduction, flexion, extension and passive rotation of the fingers. The collateral ligaments join the metacarpal to the proximal phalanx and are taut in flexion, while having some laxity in extension (figure 1).
What is a metatarsal arch?
Anatomical terminology. The arches of the foot, formed by the tarsal and metatarsal bones, strengthened by ligaments and tendons, allow the foot to support the weight of the body in the erect posture with the least weight. They are categorized as longitudinal and transverse arches.
What are the 4 arches in the foot?
The arched structure of the foot consists of the medial longitudinal arch, the lateral longitudinal arch and the anterior transverse arch; with the longitudinal arches acting as pillars for the transverse arch that runs diagonally across the tarsometatarsal joints.
What is the ball on your ankle called?
medial malleolus The most common fracture is to the bony bump on the outside of the ankle, the lateral malleolus. The lateral malleolus is the bottom of the fibula, the smaller lower leg bone. The bump on the inside of your ankle, the medial malleolus, is less commonly fractured.
What are the different types of grips?
Different Types of Grips
- Forehand.
- Slice forehand.
- One-handed backhand.
- Two-handed backhand.
- Slice backhand.
- Serve.
- Volleys.
- Overheads.
What is the pinch grip?
Simply put, a pinch grip is when the hand grasps an object with the thumb on one side of the article and the rest of the fingers on the other side of the article. … Some researchers consider a pinch grip the ability to grasp an article with just the thumb and one finger.
What is spherical grip?
A spherical grasp is one in which the hand curves to hold a round or sphere-shaped object. The intrinsic muscles of the hands play a big part in this grasp. … These allow the fingers to abduct and adduct in order to grasp smaller and larger sphere shaped objects.
What is ulnar paradox?
Ulnar paradox If the ulnar nerve lesion occurs more proximally (closer to the elbow), the flexor digitorum profundus muscle may also be denervated. … This is called the ulnar paradox because one would normally expect a more proximal and thus debilitating injury to result in a more deformed appearance.
What is flexor Retinaculum?
The flexor retinaculum is a fibrous connective tissue band that forms the anterior roof of the carpal tunnel. … The flexor retinaculum protects nine of the forearm flexor tendons and median nerve as they pass through the carpal tunnel.
What is flexor pollicis longus?
The flexor pollicis longus (FPL) is a long muscle located at the deep layer with flexor digitorum profundus and pronator quadratus in the anterior compartment of the forearm. Though it is situated at the forearm, it is classified as part of the extrinsic muscles of the hand as it’s function is seen in thumb movement.
What are the parts of hand?
Parts of a Hand
- Bones are hard tissues that give your hand shape and stability.
- Phalanges are the finger bones.
- Metacarpals are the middle part of the hand bones.
- Carpals are the wrist bones.
- Joints are places where bones fit together, allowing movement.
What is the bottom part of your palm called?
The palm comprises the underside of the human hand. Also known as the broad palm or metacarpus, it consists of the area between the five phalanges (finger bones) and the carpus (wrist joint).
What are the parts of the wrist?
Carpal bones in the wrist
- Scaphoid: long boat-shaped bone under your thumb.
- Lunate: a crescent-shaped bone beside the scaphoid.
- Trapezium: a rounded-square shaped bone above the scaphoid and under the thumb.
- Trapezoid: bone beside the trapezium that’s shaped like a wedge.
What does simian crease mean?
Simian crease is an older name for a condition now more commonly called single transverse palmar crease, or STPC. It refers to a single crease across the palm of the hand. In most individuals, there are two slightly offset creases across the palm.
What does simian crease indicate?
A single palmar crease occurs in about 1 out of 30 people, but is also frequently associated with other conditions such as Down syndrome, Aarskog syndrome or fetal alcohol syndrome. …
How many palmar arches are there?
Hand has derived its arterial supply, from two anastomotic arches, superficial and deep palmar arches which are formed between two main arteries of forearm i.e. radial, ulnar and their branches, in the palm.
Graduated from ENSAT (national agronomic school of Toulouse) in plant sciences in 2018, I pursued a CIFRE doctorate under contract with Sun’Agri and INRAE in Avignon between 2019 and 2022. My thesis aimed to study dynamic agrivoltaic systems, in my case in arboriculture. I love to write and share science related Stuff Here on my Website. I am currently continuing at Sun’Agri as an R&D engineer.