Archive for the ‘Anatomy’ Category
Ayurveda and Acne
Monday, March 16th, 2009The Human Body: Anatomical Terms (#3)
Wednesday, November 26th, 2008Ramus: a branch, which, when translated, is used to describe smaller arteries, veins and nerves arising from their parent vessels or nerves
Raphe: a seam where two similar sheets of tissue unite
Rete: a network, used to describe plexuses of small canals, nerves or vessels
Retinaculum: a band of connective tissue, usually connected at both ends to bone, which keeps tendons or other structures in place
Rima: a cleft or fissure that refers to a narrow oval or oblong opening
Root: the part of a nerve or organ which arises from another structure
Sac: a bag-like cavity or pouch
Septum: a dividing wall or partition
Sinus: a recess, a cavity or hollow space, a dilated channel for venous blood or a small tunnel
Space: a clearly demarcated segment of tissue or potential cavity
Spine: a small, sharp-pointed projection from a bone
Stria: a streak or stripe, sometimes slightly elevated
Stroma: supporting fibrous framework of tissue
Substantia: means substance or matter
Sulcus: a groove
Taenia: a flat band or tape, applied to a narrow strip of muscle
Tegmen: roof
Tela: means a web and describes a thin web-like membrane. Loosely translated, it can mean tissue
Tendon: a cord of connective tissue into which muscles fibers end by which a muscle is attached to bone or other structures
Trabecula: means a beam or bar
Tract: a bundle of fibers, often nerve fibers, having similar origins and terminations
Trigonum: a triangular space or area
Trochlea: pulley
Tuber: an enlargement or swelling
Tubercle: an eminence on a bone, usually smoother than a tuberosity
Tuberosity: a rough eminence on a bone
Tunica: a covering or coat around muscle or hollow viscera
Uvula: means little grape, usually referring to the small fleshy appendage that hangs from the soft palate
Vallecula: a wide depression, furrow or valley
Valve: a fold in an artery, vein or duct which prevents reflux of its contents
Vas: a tubular structure
Velum: means a veil or curtain
Veins: vessels that return blood from capillaries to the heart
Viscus: any organ of the digestive, respiratory or urogenital systems, or ductless gland. Viscera is the plural
The following web site does a great job of relating this information: http://home.comcast.net/~wnor/terminologyanatplanes.htm
Hamstrings
Tuesday, November 18th, 2008Tonight I learned just how tight my hamstrings are. The hamstring occupies the posterior of the body of the femur. In human anatomy, it refers to one of the tendons that make up the borders of the space behind the knee. In modern anatomical contexts, the term collectively refers to the tendons of the semitendinosus, the semimembranosus, and the biceps femoris.
The Human Body: Anatomical Terms (#2)
Monday, November 10th, 2008Ganglion: a swelling on the course of a nerve. Usually corresponds to a collection of nerve cells.
Genu: means knee: Geniculum is sometimes applied to a bent part of a structure.
Gyrus: a fold or convolution of the cerebral cortex.
Hilum: a depression or notch where blood vessels enter or leave an organ.
Humor: applied to fluids of the eye.
Infundibulum: a funnel-shaped passage.
Interdigitat: an interlocking of structures by finger-like processes, as when the fingers of the two hands are interposed.
Invaginate: a process when part of a wall of a structure is pushed inwards to that the structure which invaginates the membrane becomes partly ensheathed by it.
Isthmus: a narrow part of a duct or other passage, or a narrow strip of tissue connecting two wider parts of an organ.
Joints: places where bones meet each other (articulate). Where bones are connected by fibrous tissue, the joint is known as a fibrous joint (i.e. suture of skull). Where bones are united by cartilaginous tissue, the joint is known as a cartilaginous joint (i.e. symphysis pubis). Where a space intervenes between the articulating ends of bones, the joint is called a synovial joint (i.e. most of the joints of the body). In these joints, there is an articular capsule the encloses the joint. This capsule is lined by a synovial membrane which secretes a lubricating fluid.
Labium: lip
Lamina: A thin plate of bone or cartilage or a thin layer of softer tissues. A stratum is also used to denote a layer.
Ligament: a band of fibrous connective tissue by which bones are connected to each other. Sometimes bands of connective tissue which support the viscera or the thorax or abdomen are also known as ligaments.
Lobe: a part of an organ, often separated from the rest by a fissure. A lobule is a small lobe.
Meatus: a passage or opening.
Muscle: these structures vary in shape and size, but always consist of masses of special contractile cells which are under nervous control. It is usual to describe a muscle as possessing an origin and insertion, in the sense that when the muscle contracts, the insertion moves toward the origin. It is probably more useful to regard a muscle as possessing attachments which are approximated when the whole muscle contracts. The original of a muscle is sometimes called the head and the contractile part the belly.
Nerves: the nerves of the body can be divided into twelve pairs of cranial nerves, which arise from the brain and brainstem, 31-33 pairs of spinal nerves which arise from the spinal cord in segmental series (8 cervical, 12 thoracic, 5 lumbar, 5 sacral and 1-3 coccygeal). The spinal nerves emerge from the intervertebral foramina which lie along side of adjacent vertebrae. The pass laterally into the neck or trunk. A typical spinal nerve is formed by the union of a dorsal root, which arises from the dorsal aspect of the spinal cord and a ventral root which arises from the ventral aspect of the spinal cord. The dorsal root consists of sensory (afferent) fibers and contains a swelling called the dorsal root ganglion. This ganglion contains the cells bodies of the sensory nerve fibers. The ventral root consists of motor (efferent) nerve fibers. The nerve trunk formed by the mergence of the two roots splits immediately into a dorsal ramus and a ventral ramus. The dorsal ramus supplies the deeper muscles of the back the their overlying skin. The ventral ramus supplies muscles and skin on the lateral and ventral aspects of the body. The nerve supply of the limbs is derived entirely from the ventral rami of the spinal nerves.
Sympathetic nerves: Just at the point where the 12 thoracic and first 2 lumbar spinal nerve trunks split into a dorsal and ventral ramus, two branches leave the trunk that connect to the sympathetic chain ganglia, and these are called the communicating rami. The gray communicating ramus usually comes off first and connects to the ganglion in the sympathetic chain. It carries post ganglionic neurons from the ganglion back to the spinal nerve trunk and thence to its branches. The white communicating ramus arises a little more distal than the gray one and also connects to the sympathetic chain and its ganglia. This connection carries pre ganglionic neurons from the spinal cord to the sympathetic chain where synapses may occur at that level or past the sympathetic ganglia into other sympathetic ganglia.
Neuron: The neuron or nerve cell is the functional unit of the nervous system. Each is composed of a cell body (perikaryon) where the nucleus of the cell is located, and one or more processes. One of the processes, called the axon, is different from the others, which are called dendrites. The dendrites and body are the receiving part of the neuron and the axon is the distribution part of the neuron.
Node: a swelling or protuberance. A nodule is a small node.
Notch: an indentation or depression, usually on the border of a bone.
Nucleus: literally means a kernel or nut. In anatomy, nucleus is most often used to describe an aggregation or cluster of nerve cells.
Papilla: a small nipple-shaped elevation.
Periosteum: the fibrous covering of a bone.
Plexus: a network of nerve or vessel processes.
Pouch: pockets of peritoneum in the abdomen.
Process: an appendage or projection from the main part of a bone or organ.
Punctum: a minute opening.
The following web site does a great job of relating this information: http://home.comcast.net/~wnor/terminologyanatplanes.htm
Light Bulb
Monday, November 3rd, 2008My apparent inability to remember anatomical planes of movement and position has me less troubled at the moment. Slowly, they are sinking in. I was once complimented on the awe-inspiring of my memory in terms of remembering relatively useful information. Now, I suppose the challenge here is how to take this information and apply it to my regular life of a computer-programming, project-managing professional who spends far too many hours in a day in front of a desk. The trick, I imagine, is to bring my yoga into the office. While sitting at my desk, ensuring the straightness of my spine, that both feet are planted firmly into the ground, and recognizing the terms of movement that are in use when I am engaged with my keyboard – protraction and retraction, medial and lateral rotation as I shake my hands out to bring relief to my wrists, and elevation and depression of my chair when I adjust it accordingly. There is really something to be said for the interconnectedness of all things, and bringing this awareness to the office with me is likely to alter the ways in which I perceive my work environment and the occasional stressful elements of it.
The Human Body: Anatomical Terms (#1)
Friday, October 31st, 2008Aditus: an entrance or opening
Ala: a wing-like process
Alveolus: a deep narrow pit, such as a tooth-socket
Ampulla: used to describe the dilated part of a duct
Ansa: a loop, usually referring to a nerve
Antrum: a cavity
Aponeurosis: a glistening sheet of fibrous connective tissue from which muscle fibers arise or into which they runv
Artery: a blood vessel which conducts blood from the hear
Bone: a special form of connective tissue in which calcium salts are deposited and which provides a framework, or skeleton, for the other tissues of the body
Bursa: a membranous sac containing a small amount of viscous fluid. A bursa is usually found in tissues where friction develops, such as where a tendon crosses a bony prominence. A bursa may form synovial sheaths to surround tendons as they cross other tendons or bone
Canalva and relatively narrow channel, or tunnel, often through a bone. A canaliculus is a smaller canal
Capsule: a fibrous or membranous envelope surrounding an organ. An articular capsule surrounds each synovial joint, being attached to the bones just beyond the limits of the joint cavity
Cartilage: a firm white tissue, from which most parts of the bony skeleton are formed and which persists to protect the surfaces of bones and joints
Caruncle: a small fleshy eminenc
Cauda: tai
Cavity: a hollow space (or potential space) within the body or its organs
Cervix: means neck and is applied to the neck like portion of an organ (e.g. cervix of uterus
Chiasma: a crossing of fibers in the form of an X. Used primarily to describe nerve fibers
Commissure: a band of fibers which join corresponding right and left parts of a structure across the median plane
Corpus: means bod
Cortex: outer part, or rind, or some organs as distinguished from their inner part, or core usually called a medulla
Crest: a projecting ridge, especially one which on a bon
Crus: means a leg and is applied to a structure that resembles a leg or stal
Decussation: same as a chiasma. A crossing of fibers in the form of an X
Digitation: a finger like process of a muscle
Disc: a flat round structure usually applied to plates of cartilage in joints
Duct: a tube for the passage of fluid, especially secretions of glands. A ductule is a small duct
Epithelium: a layer of cells which forms the external surface of the skin, or which lines the cavities of the digestive, respiratory and urogenital organs, serous cavities, inner coats of blood and lymphatic vessels, gland and cavities within the brain. The epithelium of the skin is the epidermis. The epithelium of the digestive, respiratory and urogenital organs is moistened by a film of mucus and is known as the mucous coat. The epithelium lining bloods vessels is known as the endothelium. Serous cavities are lined by epithelium called mesothelium
Fascia: tissue which lies immediately deep to the skin known as subcutaneous tissue. It usually consists of a layer of connective tissue which contains fat, and of a deep and more fibrous layer which adheres to the surface of the underlying muscle and vessels. These layers are known as superficial and deep fascia respectively. Fascia surrounds every muscle, organ, vessel and nerve in the body
Fasciculusva small bundle. A term that is usually applied to collections of nerve fibers
Filum: literally mean a “thread”. This name is given to several thread-like structures such as the filum terminale, the lower extension of the pia mater of the spinal cord
Fold: a ridge formed where a membrane doubles back on itself
Folium: mean leaf. The plural “folia” is applied to the folds of the cortex of the cerebellum
Foramen: a hole, often in a bone or between adjacent bones
Fossa: a “ditch”, usually referring to a shallow depression or cavity
Fovea: a small pit or foss
Frenulum: a small fold of the mucous coat which limits the movement of the structure to which it is attached
Fundus: used to denote the widest part of a hollow organ
The following web site does a great job of relating this information: http://home.comcast.net/~wnor/terminologyanatplanes.htm
The Human Body: Terms of movement
Friday, October 31st, 2008| Term 1 | Term 2 | Description |
| Flexion | Extension | Increasing angle with frontal plane Decreasing angle with frontal plane |
| Abduction | Adduction | Moving away from the sagittal plane Moving toward the sagittal plane |
| Protraction | Retraction | Moving forward along a surface Moving backward along a surface |
| Elevation | Depression | Raising a structure Lowering a structure |
| Medial Rotation | Lateral Rotation | Movement around an axis of a bone |
| Pronation | Supination | Placing palm backwards Placing palm forwards |
| Circumduction | Combined movement of flexion Extension, abduction, adduction Medial and lateral rotation Circumscribe a cone |
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| Opposition | Bringing tips of fingers and thumb together (as in picking something up) |
The following web site does a great job of relating this information: http://home.comcast.net/~wnor/terminologyanatplanes.htm
The Human Body: Terms of relation/position
Thursday, October 30th, 2008I have high-hopes that blogging about this subject will assist in cementing this knowledge in my (already full) cranium:
| Term 1 | Term 2 | Description |
| Superior (closer to the head) | Inferior (closer to the feet) | Horizontal plane |
| Posterior (dorsal) | Anterior (ventral) | Frontal or coronal plane medial |
| Medial (near the midline) | Lateral (away from the midline) | Sagittal plane |
| Proximal (closer to the origin of a structure) | Distal (further from the origin of a structure) | Origin of a structure |
| Superficial | Deep | Surface of body or organ |
| Median | Along the medial or mid-sagittal plane | |
| Intermediate | Between two other structures | |
| External | Internal | Refers to a hollow structure |
| Supine | Prone | Face/palm up lying on back, down when lying on front |
| Cephalad | Caudad | Towards the head or feet |
The following web site does a great job of relating this information: http://home.comcast.net/~wnor/terminologyanatplanes.htm
Bones: The Ossuary System
Monday, October 20th, 2008For me, personally, memorizing the bones of the skull has been the most challenging part of the ossuary system. Granted, I’m sure there are folks out there who would find the entire 200+ bones of the skeletal system to be a pickle to remember, but I’m choosing to focus on my own particular area of weakness.
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Image Credit: http://www.scienceartandmore.com/ProductImages/ACH/3763.jpg
