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Related Concept Videos

Spinal Nerves: Plexus II01:21

Spinal Nerves: Plexus II

The plexuses of the lower body include the lumbar, sacral, and coccygeal plexuses, which innervate the abdomen, pelvis, legs, and coccygeal region. These plexuses control the transmission of sensory information and coordinate motor functions of the lower body.
The Lumbar Plexus
The lumbar plexus is situated within the lumbar region of the back and is primarily formed by the first four lumbar spinal nerves (L1 to L4). This plexus extends its branches into several nerves, including the...
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The neuronal supply to the gastrointestinal (GI) tract is essential for regulating various functions, including digestion, absorption, and movement of food. This intricate network of nerves is known as the enteric nervous system (ENS), often referred to as the "second brain" of the body.
The enteric nervous system consists of two major plexuses: the myenteric plexus (Auerbach's plexus) and the submucosal plexus (Meissner's plexus). These plexuses are located within the layers of the GI tract...
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Arteries of Lower Limbs

The external iliac artery transitions out of the body cavity, entering the femoral region of the lower leg, and is renamed the femoral artery at the point where it traverses the body wall. This artery is responsible for the distribution of blood to the thigh's deep muscles and the skin's ventral and lateral regions, achieved through several minor branches and the lateral deep femoral artery, which also spawns a lateral circumflex artery. The knee area receives blood from the genicular artery,...
Abdominal Regions and Quadrants01:19

Abdominal Regions and Quadrants

To promote clear communication, for instance, about the location of a patient's abdominal pain or a suspicious mass, anatomists and clinicians typically use imaginary lines to categorize the abdominopelvic cavity into either four quadrants or nine regions to identify organs in the cavity.
The simpler quadrants approach, which is more commonly used in medicine, subdivides the cavity with one horizontal and one vertical line that intersects at the patient's umbilicus (navel). The four quadrants...
Gross Anatomy of Skeletal Muscles01:12

Gross Anatomy of Skeletal Muscles

The connective tissues play a significant role in arranging the muscle fibers into a hierarchical structure that forms a complete muscle. Consider a muscle like the bicep brachii, commonly called the bicep. This muscle comprises thousands of muscle fibers enclosed by a protective layer of connective tissue called the endomysium. The endomysium is primarily composed of reticular fibers, a type of thin collagen fiber. It allows the exchange of nutrients and waste products at the fiber level,...
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Spinal Nerves: Plexus I

Nerve plexuses are networks of interlacing nerves that serve as communication hubs to distribute and organize nerve action across various body regions. The nerve plexuses are organized into the cervical plexus located in the neck region, brachial plexus in the shoulder area, lumbar plexus found in the lower back, sacral plexus situated in the pelvis, and coccygeal plexus located in the coccygeal region.
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Updated: May 7, 2026

Dissection of Pelvic Autonomic Ganglia and Associated Nerves in Male and Female Rats
09:48

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Published on: March 7, 2020

Anatomic variability of groin innervation.

P Bachul1, K A Tomaszewski, E K Kmiotek

  • 1Department of Anatomy, Jagiellonian University Medical College, Krakow, Poland. krtomaszewski@gmail.com.

Folia Morphologica
|September 27, 2013
PubMed
Summary

Inguinal hernia repair requires careful attention to nerve anatomy. This study found unusual variations in groin nerve pathways, emphasizing the need for precise identification to prevent postoperative pain.

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Area of Science:

  • Anatomy
  • Surgical Anatomy
  • Neuroanatomy

Background:

  • Inguinal hernia repair is a common surgical procedure complicated by the intricate anatomy of inguinal nerves.
  • Surgical injury to these nerves can lead to chronic postoperative pain and complications.
  • Understanding anatomical variations is crucial for successful surgical outcomes.

Observation:

  • A cadaveric dissection revealed atypical innervation of the inguinal region.
  • The left ilioinguinal nerve was absent.
  • The left genital branch of the genitofemoral nerve originated unusually high and supplied the groin.

Findings:

  • The study identified significant variations in the course of the left ilioinguinal nerve, left genital branch of the genitofemoral nerve, left lateral cutaneous femoral nerve, and right genital branch of the genitofemoral nerve.
  • Atypical innervation patterns were noted in the groin region.
  • The left genital branch of the genitofemoral nerve compensated for the absent ilioinguinal nerve.

Implications:

  • Awareness of these anatomical variations is vital for surgeons performing inguinal hernia repairs.
  • Proper nerve identification and preservation can reduce the incidence of chronic postoperative pain.
  • This case highlights the importance of detailed anatomical knowledge in surgical planning.