関連する実験動画
Updated: Sep 9, 2025

06:44
Cantilever Bending of Murine Femoral Necks
Published on: January 5, 2022
2.2K
男性と女性の早期から後半の成人期における首の受動性硬化と運動範囲
Mingyue Liu1, Ryan D Quarrington2, William S P Robertson3
1School of Electrical and Mechanical Engineering, The University of Adelaide, Level 7, Adelaide Health and Medical Sciences Building, North Terrace, Adelaide, SA, 5000.
まとめ
パッシブな首の動きの範囲は,特に横向の曲げと軸の回転では,年齢とともに減少します. 首の硬さは一般的に年齢とともに増加し,男性は特定の動きで女性よりも高い硬さを示します.
科学分野:
- バイオメカニクス
- 人間の生理学
- ゲロントロジー
背景:
- 首の被動的な運動範囲 (ROM) と硬さを理解することは,臨床応用と生体力学モデリングにおいて極めて重要です.
- 年齢と性別は,筋骨格の性質に影響を与える要因として知られています.
研究 の 目的:
- 異なる動きで被動的な頭と首のROMと硬さを定量化します.
- 年齢,性別,およびこれらの生体力学的パラメータの関係を調査します.
主な方法:
- 頸部疾患の歴のない20~80歳の 80人の被験者の体内検査
- 頭と体の動きを測るためのカスタム製の装置と,受動的な回転中のモメントを使用した.
- 筋肉の活性化を監視し,受動状態を保証し,モメント・アングルのデータを分析して,硬さを決定する.
主要な成果:
- パッシブ・ネック・ROMは,横向きの屈折と軸の回転で年齢とともに減少した (年0. 2°).
- 拡張ROMは男性では女性よりも低い (5. 8°).
- パッシブな硬さは,年齢とともに横向の曲げ,軸の回転,およびいくつかの拡張領域で増加し,男性は一般的に女性よりも高い硬さを示した.
結論:
- パッシブ・ネック・ROMは年齢とともに低下し,特に横向の屈折と軸の回転で減少する.
- ほとんどの運動において 年齢とともに 首の受動的な硬さが増加する傾向があります
- 首のROMと硬さの確立されたベンチマークは,臨床評価とコンピューティングモデリングを助けることができます.
関連する概念動画
Changes in the Appendicular Skeleton with Age
2.2K
The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
2.2K
Bone Disorders
3.9K
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
3.9K
Muscles of the Anterior Neck
2.5K
The anterior neck muscles are the group of muscles covering the front part of the neck. These muscles are classified into three subgroups. The first one is the superficial muscles, the most visible muscles in the front of the neck. It includes the platysma and sternocleidomastoid. The second group is the suprahyoid muscles, located above the hyoid bone. This group comprises the digastric, mylohyoid, geniohyoid, and stylohyoid. Lastly, the infrahyoid muscles are found below the hyoid bone and...
2.5K
Signs of Puberty
606
Puberty is a critical phase, typically beginning between the ages of 8 and 13 in girls and 9 and 14 in boys, though timing can vary based on genetics, environmental factors, and overall health. This period is characterized by the development of secondary sexual characteristics and the attainment of reproductive potential. Endocrine changes underpin puberty, with hormonal surges of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) instigated by Gonadotropin-Releasing Hormone (GnRH)...
606
Menopause
248
Menopause, a natural biological process marking the end of a woman's fertility, typically occurs between the fifth and sixth decade of life. This phase is characterized by the exhaustion of the ovarian follicle pool, leading to less responsive ovaries despite the high levels of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH). The consequential decrease in estrogen production results in symptoms like hot flashes, heavy sweating, headaches, hair loss, muscle pains, vaginal...
248
The Effect of Aging on Tissues
2.4K
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
2.4K

