Perineal muscle at the root of vagina and perineum is?

Appeared in: AIIMS Rishikesh & Jodhpur NO - 2017

Explanation

The Bulbospongiosus is a superficial muscle located in the perineum, the area between the anus and the vulva.
It covers the vestibular bulbs at the base of the vagina and attaches to the perineal body.
Its functions include constricting the vaginal opening, contributing to clitoral erection, and supporting the pelvic floor.
This muscle is part of the superficial perineal pouch.

Option B: The Masseter muscle is a primary muscle of mastication (chewing) and is located in the jaw, not the perineum.
Option C: The Gluteus muscles (maximus, medius, minimus) are located in the buttocks and are responsible for hip and thigh movement.
Option D: This option is incorrect because only the Bulbospongiosus muscle is located in the perineum. The Masseter and Gluteus muscles are in the jaw and buttocks, respectively.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of Perineal Muscles as background academic context rather than a clinical decision trigger.
The perineal body, where the bulbospongiosus muscle attaches, is the structure often incised during an episiotomy in childbirth. Knowledge of this anatomy is crucial for performing and repairing perineal tears and episiotomies.
The bulbospongiosus muscle contributes to sexual arousal and orgasm by constricting the vagina and aiding in clitoral erection.
Strengthening the perineal muscles, including the bulbospongiosus, through exercises like Kegels can help improve pelvic floor support and prevent urinary incontinence.

How to Approach the Question

This is a factual recall question based on anatomical knowledge.
First, identify the key anatomical region mentioned in the question: 'root of vagina and perineum'.
Second, evaluate each muscle option based on its known anatomical location.
Recall or deduce that the Bulbospongiosus is a muscle of the perineum.
Recognize that the Masseter (jaw) and Gluteus (buttocks) muscles are located in entirely different body regions.
Eliminate the incorrect options and, consequently, the 'All of above' option to confirm the correct answer.

Concept Tested & Keywords

Q-PV0qLuwF8jPm6hAIASB7

E6 Gynecology Williams pp. 402-404, 404-406

E6 Anatomy Workbook BDChaurasia V2 10e p. 79-81

Practise the full AIIMS Rishikesh & Jodhpur NO - 2017

Attempt every question from this paper in a timed mock, then review the full solution for each one.