| middle collateral artery | <anatomy, artery> The posterior terminal branch of the profunda brachii, anastomosing with the arteries which form the articular network of the elbow. Synonym: arteria collateralis media. (05 Mar 2000) |
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| middle constrictor muscle of pharynx | Origin, stylohyoid ligament, lesser cornu of the hyoid bone (chondropharyngeal part) and greater cornu of the hyoid bone (ceratopharyngeal part); insertion, pharyngeal raphe in the posterior wall of the pharynx; action, narrows pharynx in the act of swallowing; nerve supply, pharyngeal plexus. Synonym: musculus constrictor pharyngis medius. (05 Mar 2000) |
| middle costotransverse ligament | <anatomy> The ligament that connects the dorsal aspect of the neck of a rib to the ventral aspect of the corresponding transverse process. Synonym: ligamentum costotransversarium, ligamentum colli costae, middle costotransverse ligament. (05 Mar 2000) |
| middle cranial fossa | A butterfly-shaped portion of the internal base of the skull posterior to the sphenoidal ridges and limbus and anterior to the crests of the petrous part of the temporal bones and dorsum sellae; it lodges the temporal lobes of the brain in the lateral portions, and the hypophysis centrally. Synonym: fossa cranii media. (05 Mar 2000) |
| middle cuneiform bone | A bone of the distal row of the tarsus; it articulates with the medial and lateral cuneiform, navicular, and second metatarsal bones. Synonym: os cuneiforme intermedium, mesocuneiform, middle cuneiform bone, second cuneiform bone, wedge bone. (05 Mar 2000) |
| middle ear | middle ear |
| middle ear mass | <radiology> Glomus tumour (multiple in 10%; 8% malignant), glomus tympanicum, from cochlear promontory, seldom erodes bone, glomus jugulare, invasion of middle ear from below, destruction of bony roof of jugular fossa and bony spur separating vein from carotid artery, abberant carotid artery (no bony margin), enlarged jugular bulb (dehiscent bony covering), cholesteatoma, rhabdomyosarcoma (orbit greater than nasopharynx greater than ear), adenocarcinoma (rare) (12 Dec 1998) |
| middle ear ventilation | Ventilation of the middle ear in the treatment of secretory (serous) otitis media, usually by placement of tubes or grommets which pierce the tympanic membrane. (12 Dec 1998) |
| middle east | The countries of southwest asia and northeastern africa usually considered as extending from libya on the west to afghanistan on the east. (12 Dec 1998) |
| middle ethmoidal air cells | The middle group of air cells of the ethmoidal sinus's; each sinus communicates with the middle meatus of the nasal cavity. Synonym: sinus ethmoidales mediae, cellulae mediae, middle cells, middle ethmoidal sinuses. (05 Mar 2000) |
| middle ethmoidal sinuses | The middle group of air cells of the ethmoidal sinus's; each sinus communicates with the middle meatus of the nasal cavity. Synonym: sinus ethmoidales mediae, cellulae mediae, middle cells, middle ethmoidal sinuses. (05 Mar 2000) |
| middle finger | Third finger. Synonym: digitus medius, digitus tertius, third finger. (05 Mar 2000) |
| middle frontal convolution | A convolution on the convexity of each frontal lobe of the cerebrum running in an anteroposterior direction between the superior and inferior frontal sulci. Synonym: gyrus frontalis medius, middle frontal convolution. (05 Mar 2000) |
| middle frontal gyrus | A convolution on the convexity of each frontal lobe of the cerebrum running in an anteroposterior direction between the superior and inferior frontal sulci. Synonym: gyrus frontalis medius, middle frontal convolution. (05 Mar 2000) |
| middle frontal sulcus | A relatively shallow sagittal fissure of the brain dividing the middle frontal convolution into an upper and lower part; this sulcus is found only in humans and anthropoid apes; at its anterior extremity it bifurcates, the two branches spreading out laterally and constituting the frontomarginal sulcus. Synonym: median frontal sulcus, sulcus frontalis medius. (05 Mar 2000) |