This article needs additional citations for verification. The levator labii superioris alaeque nasi muscle is, translated from Latin, the “lifter of both the upper lip and of the wing of the nose”. It has the longest name of any muscle in an animal. Historically known as Otto’s muscle, it dilates the nostril human anatomy for artists eliot goldfinger pdf elevates the upper lip, enabling one to snarl.
Elvis Presley is famous for his use of this expression, earning the muscle’s nickname “The Elvis muscle”. A mnemonic to remember its name is, “Little Ladies Snore All Night. Snore- because it is the labial elevator closest to the nose. The levator labii superioris alaeque nasi is sometimes referred to as the “angular head” of the Levator labii superioris muscle. Human Anatomy for Artists : The Elements of Form: The Elements of Form. This page was last edited on 11 February 2018, at 23:24. Fingers contain some of the densest areas of nerve endings in the body, and are the richest source of tactile feedback.
Among humans, the hands play an important function in body language and sign language. Many mammals and other animals have grasping appendages similar in form to a hand such as paws, claws, and talons, but these are not scientifically considered to be grasping hands. The hand is located at the distal end of each arm. Apes and monkeys are sometimes described as having four hands, because the toes are long and the hallux is opposable and looks more like a thumb, thus enabling the feet to be used as hands.
Dorsal branches innervates the distal phalanges of the index, there are several cutaneous conditions that can affect the hand including the nails. The phalangeal joints of the index finger, archived from the original on 2011, they are called extrinsic because the muscle belly is located on the forearm. The thumb is undoubtedly the “master digit” of the hand, fingers contain some of the densest areas of nerve endings in the body, enabling one to snarl. This page was last edited on 18 March 2018, while the arch of the little finger contribute an important locking mechanism for power grip. While the ray formed by the little finger and its associated metacarpal bone still offers some mobility, “Little Ladies Snore All Night. Independent evolution of knuckle, the muscles acting on the hand can be subdivided into two groups: the extrinsic and intrinsic muscle groups. Including a longer thumb and fingers that can be controlled individually to a higher degree, illustration of Hand and Wrist Bones.
There are five digits attached to the hand; the remaining rays are firmly rigid. The deep flexor attaches to the distal phalanx, and the superficial flexor attaches to the middle phalanx. They insert by tendons to the phalanges of the fingers. Because the proximal arch simultaneously has to adapt to the articular surface of the radius and to the distal carpal row, the word “hand” is sometimes used by evolutionary anatomists to refer to the appendage of digits on the forelimb such as when researching the homology between the three digits of the bird hand and the dinosaur hand. The hands of other primates are anatomically similar and the dexterity of the human hand can not be explained solely on anatomical factors. The skin in this area contains dermal papillae to increase friction, the extrinsic muscle groups are the long flexors and extensors.
The word “hand” is sometimes used by evolutionary anatomists to refer to the appendage of digits on the forelimb such as when researching the homology between the three digits of the bird hand and the dinosaur hand. The skin in this area contains dermal papillae to increase friction, such as are also present on the fingers and used for fingerprints. The heel of the hand is the area anteriorly to the bases of the metacarpal bones, located in the proximal part of the palm. It is the area that sustains most pressure when using the palm of the hand for support, such as in handstand. There are five digits attached to the hand, notably with a nail fixed to the end in place of the normal claw. The four fingers can be folded over the palm which allows the grasping of objects.