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Spinotectal tract. Tractus spinotectalis. Its 16 fibers arise from the posterior horn of the opposite side, run in the lateral spinothalamic tract and end in the tectal lamina. A Spinothalamic tract. Tractus spinothalamicus. 17 Lies in the lateral funiculus and arises primarily from the opposite side. Its fibers transmit pain and temperature sensations. A Anterior spinocerebellar tract. Tractus spino-cerebellaris anterior [[Gowers]]. It extends 18 partly from the opposite side and transmits to the cerebellum information necessary for the coordination of movements concerning muscle extension and limb position. A 19

Posterior spinocerebellar tract. Tractus spino-cerebellaris posterior [[Flechsig]]. Its fibers are uncrossed and function similar to those of the anterior spinocerebellar tract. A 20

Dorsolateral tract. Tractus dorsolateralis [[Lis-sauer]]. Bundle of fine myelinated and nonmy-elinated fibers between the apex of the posterior horn and the surface. The fibers are short and some form lateral branches of posterior 21 root fibers. A

Spino-olivary tract. Tractus spino-olivaris [[Hellweg]]. Predominantly crossed fibers to the 22 olive. They lie by the anterior root fibers together with the olivospinal tract. A Spinoreticular tract. Tractus spinoreticularis. 23 Its fibers lie beside the spino-olivary tract and end in the reticular substance of the medulla oblongata. A

Posterior funiculus. Funiculus posterior. White 24 matter between the posterior horns. A Posterior fasciculi proprii. Fasciculi proprii posteriores. They lie directly on the gray matter and unite individual spinal cord segments for coordinated activity. 25

Septomarginal fasciculus. Fasciculus septo-marginalis. Bundle of mostly descending fibers 26 situated along the posterior median septum in the lower half of the thoracic spinal cord. A Interfascicular fasciculus. Fasciculus interfascicular. Bundle of mostly descending fibers [comma tract of Schultze] located chiefly in the upper half of the thoracic spinal cord between the fasciculi gracilis and cuneatus. A Fasciculus gracilis [[Goll]]. Medial fasciculus that contains fibers from the lower half of the spinal cord which function in the transmission of tactile and proprioceptive sensory information. A

Fasciculus cuneatus [[Burdach]]. It begins with the upper half of the thoracic cord an likewise contains fibers for transmission of tactile and proprioceptive impulses. A BRAIN. Encephalon.

BRAINSTEM. Truncus encephali. It extends from the medulla oblongata to the midbrain. According to some, the diencephalon and insula likewise belong to the brainstem.

HINDBRAIN. Rhombencephalon. It includes the brain substance around the rhomboid fossa, thus the cerebellum, pons with dorsally attached substance and medulla oblongata. B MEDULLA OBLONGATA (BULBUS). Beginning at the lower margin of the pons, it extends up to the root fibers of C1. In the rhomboid fossa it arises from the medullary striae of the 4th ventricle. B

Anterior median fissure. Fissura mediana anterior. Anterior groove continuous with that of the spinal cord. The pyramidal decussation crosses over it. C

Pyramid. Pyramis [medullae oblongatae]. Longitudinal elevation of pyramidal tract fibers to the right and left of the anterior median fissure. It ends with the pyramidal decussation. C Pyramidal decussation. Decussatio pyr-amidum (dec. pyramidalis anterior motoria). 3-5 bundles of lateral pyramidal tract fibers crossing to the opposite side at the end of the medulla. C

Anterolateral sulcus. Sulcus anterolateralis. Furrow lateral to the pyramid for transmission of the hypoglossal nerce. C Lateral funiculus. Funiculus lateralis. Continuation of the lateral funiculus of the spinal cord up to the olive. C

Olive. Oliva. Bean-shaped prominence about 1.5 cm long between the roots of cranial nerves X and XII. it is produced by the nuclei lying beneath it. C

Anterior external arcuate fibers. Fibrae ar-cuatae externae anteriores. Fibers from the arcuate nucleus coursing over the caudal end of the olive to the caudal cerebellar peduncle. Part of the pontocerebellar tract. C Retro-olivary sulcus. Sulcus retro-olivaris. Furrow behind the olive. C

Retro-olivary area. Area retro-olivaris. Area behind the olive. C

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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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