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  • noun

Synonyms for theca

a case or sheath especially a pollen sac or moss capsule

outer sheath of the pupa of certain insects

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References in periodicals archive ?
The L5S1 level is often avoided due to its deeper anatomic location, preponderance for degenerative change, and typically narrower thecal sac.
Androgen synthesis predominantly takes place in thecal cells which have LH receptors and subsequent signaling and activation of CYP17 enzyme convert pregnenolone and progesterone to dehydroepiandrosterone (DHEA) and androstenedione, respectively.
Intraoperatively, a hematoma was visualized upon opening of the thecal sac and the hematoma was evacuated with gentle suction.
The amount of the contrast agent collecting in the upper thoracic and cervical thecal sacs may be less than that in the lumbar region.
Medina, "Insulin stimulates testosterone biosynthesis by human thecal cells from women with polycystic ovary syndrome by activating its own receptor and using inositolglycan mediators as the signal transduction system," The Journal of Clinical Endocrinology and Metabolism, vol.
siamensis by lacking body undulation and having fine pores densely scattered on the thecal plates in addition to the larger pores found on both species.
Later on, MRI cervical spine (plain) was performed which showed straightening of the cervical spine and C5-C6 disc protrusion with annular tear causing ventral thecal sac cord compression at this site.
damage to convoluted seminiferous tubules epithelium, reduction of spermatozoa formation and increase in prevalence of teratospermia, atrtic follicles congestion in stromal tissue, decrease in follicle and oocyte number, increased level of Cr(VI) in blood, increased duration of estrus cycle, disintegrated cell membranes of two layered follicular cells and altered villiform mitochondria in thecal cells (Li et al., 1999; Murthy et al., 1996; Elbetieha and Al-Hamood, 1997).
Various experimental cell culture studies involving human and some animal species have shown that thyroid hormones have, to some degree, a stimulatory effect on granulosa and/or thecal cells (1-3).
LH supports thecal cells in the ovary, which provide androgens and hormonal precursors for estradiol production.
There is also hypertrophy and, more importantly, a buckling of the ligamentum flavum, mainly during extension, which contribute to the decrease of the spinal canal area and thus reducing the space available for the thecal sac and cauda equina.
RC: renal corpuscle; RP: red pulp; WP: white pulp; L: Leydig cells; ST: seminiferous tubule; OC: oocyte; G: granulosa cells; T: thecal cells.
Neurologic complications from osteomyelitis often arise from epidural abscess formation and since the dura is tightly adherent to the foramen magnum separating intracranial dural space from the spinal thecal sac, epidural abscesses typically do not cross from thecal sac intracranially.
In our study we used laminar spreader to distract two motion segments and the placement of the distractor and screws did not interfere with the dissection and in fact, this system allowed for easy visualization of the nerve roots, thecal sac, and disc space.