関連する実験動画
Updated: Aug 18, 2026

08:26
Assessing Activity-based Anorexia in Mice
Published on: May 14, 2018
まとめ
超音波検査は,体重回復中の神経性食欲症患者の卵巣の変化を明らかにします. 卵巣の体積と胞の発達は,体重指数 (BMI) の増加とともに正常化し,飢餓によって誘発された下垂体・胞軸の機能不全を示唆する.
科学分野:
- 生殖内分泌学 生殖内分泌学
- メディカルイマージング (医学イメージング)
- 栄養精神科医の精神医学について
背景:
- アノレキシア・ネヴォーサは,下垂体・状腺軸の機能不全と関連しています.
- 神経性食欲不全の卵巣と子宮の形態は,回復過程でよく特徴づけられていません.
研究 の 目的:
- 栄養失調症患者の体重増加中に卵巣と子宮の超音波変化を記述する.
- これらの変化とボディマス指数 (BMI) を相関させる.
主な方法:
- 体重増加中に神経性拒食症の11人の患者の卵巣と子宮の連続的な超音波スキャン.
- 卵巣の体積の測定と卵巣の形態学的評価 (キストの存在).
- 超音波検査の結果とボディマス指数 (BMI) の相関.
主要な成果:
- 卵巣の体積は,通常の女性と比較して入院時に小さかったが,体重増加とともに対数的に増加した.
- 複数の小卵巣シストは,BMIが17kg/m2に達したすべての患者で観察されました.
- 支配的な卵巣キストは,さらに体重が増加した5人の患者に現れ,平均BMIは約19kg/m2であった.
- 卵巣の形態学的変化は,正常な思春期の発達に似ている.
結論:
- 神経性食欲不振における下垂体-腺軸機能不全は,飢餓の結果であるように思われる.
- 不妊患者における卵巣システィスの超音波検査の証拠は,治療を必要とする主な問題として栄養不良を示唆する可能性があります.
関連する概念動画
Oogenesis
In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
Ovaries
The ovaries are roughly the size of almonds and measure approximately 2 to 3 centimeters in length. These paired structures are situated within the pelvic region and are anchored by the mesovarium—a peritoneal extension that also connects them to the wider structure of the broad ligament. The support system extends to the suspensory ligament, housing blood and lymphatic vessels. In addition, the ovarian ligament tethers the ovaries to the uterus.
On the ovarian surface, a layer of cuboidal...
On the ovarian surface, a layer of cuboidal...
Ovarian Cycle
The menstrual cycle includes a critical component known as the ovarian cycle, which undergoes two main phases each month—the follicular phase and the luteal phase. The follicular phase is variable and averaging around 14 days. Ovulation, triggered by a surge in luteinizing hormone (LH), marks the transition between the two phases. The second phase, the luteal phase, is relatively consistent, lasting approximately 14 days, and is marked by the activity of the corpus luteum. While a cycle length...
Oogenesis
Oogenesis, the process of developing egg cells (female gametes), occurs within the ovaries and is fundamental to female fertility. This sequence begins during fetal development when diploid oogonia in the developing ovaries undergo mitotic divisions to produce primary oocytes. By birth, these primary oocytes enter prophase I of meiosis but become arrested in this stage, remaining suspended until puberty.
Each primary oocyte is surrounded by a layer of pre-granulosa cells, forming what is known...
Each primary oocyte is surrounded by a layer of pre-granulosa cells, forming what is known...
Hormonal Control of the Ovarian Cycle
The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...
Cirrhosis I: Introduction
Cirrhosis is a chronic, irreversible liver disease characterized by the widespread replacement of healthy liver tissue with fibrotic scar tissue and the formation of regenerative nodules.Etiology of cirrhosisCirrhosis results from sustained liver injury that triggers progressive fibrosis and structural remodeling. The underlying causes are diverse, encompassing common and less frequent clinical conditions. Regardless of the origin, all causes lead to chronic inflammation, hepatocyte loss, and...

