Uploaded March 2022 | Updated September 2026, 2 weeks ago
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Content:
0:00 Introduction
00:28 Veins of the Systemic Circulation
01:01 Subclavian Vein
02:08 Axillary Vein
03:05 Two Systems of Veins
03:35 Deep System of Veins
04:36 Superficial System of Veins
Subclavian Vein
- Passes within the groove for the subclavian vein (sulcus venae subclaviae)
- Dorsal Scapular Vein (vena scapulaaris dorsalis)
- External Jugualar vein (vena jugularis externa)
Axillary Vein
- Start at the border of the Teres Major Muscle (musculus teres major)
- Thoraco-epigastric vein (venae thoracoepigastricae)
- Lateral Thoracic Vein (Vena Thoracica Lateralis)
- Anterior Circumflex Humeral Vein (vena circumflexa humeri anterior)
- Posterior Circumflex Humeral Vein (Vena circumflexa humeri posterior)
- Cephalic Vein (Vena Cephalica)
Deep system of veins
- Deep veins follow the course of the arteries and Two veins until the armpit
- Brachial Veins (Venae Brachiales)
- Ulnar Veins (Venae Ulnares)
- Collateral Veins of the elbow (venae collaterale articulationis cubiti)
○ Deep brachial veins
○ Superiro Ulnar Collateral Vein
○ Inferior Ulnar Collateral Vein
○ Radial Recurrent Vein
- Radial Veins (Venae Radiales)
- Deep Venous Palmar Arch (arcus venous palmaris profundus)
Superficial System of Veins
- Basilic Vein (vena basilica)
- Cephalic Vein (vena cephalica)
- Median cubital vein (vena mediana cubiti)
- Median Antebrachial Vein (vena mediana antebrachii)
- Intercaputular vein (venae intercapitulares)
- Dorsal Venous network of hand (rete venosum dorsale manus)
🌐 Website: taimtalksmed.com
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📲 Other Links:
Instagram: instagram.com/taimtalksmed
Discord: discord.com/invite/DENMUpS8ey
Content:
0:00 Introduction
00:28 Veins of the Systemic Circulation
01:01 Subclavian Vein
02:08 Axillary Vein
03:05 Two Systems of Veins
03:35 Deep System of Veins
04:36 Superficial System of Veins
Subclavian Vein
- Passes within the groove for the subclavian vein (sulcus venae subclaviae)
- Dorsal Scapular Vein (vena scapulaaris dorsalis)
- External Jugualar vein (vena jugularis externa)
Axillary Vein
- Start at the border of the Teres Major Muscle (musculus teres major)
- Thoraco-epigastric vein (venae thoracoepigastricae)
- Lateral Thoracic Vein (Vena Thoracica Lateralis)
- Anterior Circumflex Humeral Vein (vena circumflexa humeri anterior)
- Posterior Circumflex Humeral Vein (Vena circumflexa humeri posterior)
- Cephalic Vein (Vena Cephalica)
Deep system of veins
- Deep veins follow the course of the arteries and Two veins until the armpit
- Brachial Veins (Venae Brachiales)
- Ulnar Veins (Venae Ulnares)
- Collateral Veins of the elbow (venae collaterale articulationis cubiti)
○ Deep brachial veins
○ Superiro Ulnar Collateral Vein
○ Inferior Ulnar Collateral Vein
○ Radial Recurrent Vein
- Radial Veins (Venae Radiales)
- Deep Venous Palmar Arch (arcus venous palmaris profundus)
Superficial System of Veins
- Basilic Vein (vena basilica)
- Cephalic Vein (vena cephalica)
- Median cubital vein (vena mediana cubiti)
- Median Antebrachial Vein (vena mediana antebrachii)
- Intercaputular vein (venae intercapitulares)
- Dorsal Venous network of hand (rete venosum dorsale manus)



![CN 6: Abducens Nerve (Scheme, Pathway, Clinical Relevance) | Neuroanatomy
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Content:
0:00 Introduction
00:41 Abducens Nerve Scheme
01:53 Abducens Nerve Nucleus
04:05 Abducens Nerve Course
05:04 Lateral Rectus Muscle Function
06:25 Clinical Relevance
07:06 Recap
Abducens nerve is purely a motor nerve supplying the lateral rectus muscle involved in abduction of the eye
Abducens/abducent nerve Nucleus:
- Nucleus of abducens nerve (nucleus nervi abducentis)
○ Facial nerve goes around this nucleus forming the facial colliculus (colliculus facialis)
○ A somatomotor nucleus that is located in the pons innervates the lateral rectus
Course:
- Emerges from the medullopontine sulcus between the pons and medulla oblongata
- Leaves the brainstem on the ventral side
- Runs on the base of the skull, penetrates the dura mater then enter the cavernous sinus
- Enters the orbit via the superior orbital fissure and common tendinous ring
- Then innervates the lateral rectus
Function of lateral rectus muscle:
- Abduction of the eye
Herings Law of equal innervation:
- Coordinates both eyes together, so that the medial and the lateral rectus muscle contracts equally, while deactivating the contralateral muscle through the medial longitudinal fasciculus.
Clinical Relevance:
- Abducens nerve can get compressed by a lesion or rise in intracranial pressure.
- Compression causes paralysis of lateral rectus muscle, resulting in medial deviation of affected eye, giving a fully adducted eye at rest and an inability to abduct the eye.
Sources:
- Singh, I. (2017). Human neuroanatomy (10th ed.).
Helwany M, Bordoni B. Neuroanatomy, Cranial Nerve 1 (Olfactory) [Updated 2022 Aug 8]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2022 Jan-
- Kozlowski, T. (2017). Memorix Anatomy: The Complete Study Guide. 2nd ed. Thieme Medical Publishers.
Pictures and visuals:
- Complete Anatomy
- Biorender
- Powerpoint
- Camtasia 2021 CN 6: Abducens Nerve (Scheme, Pathway, Clinical Relevance) | Neuroanatomy](https://i.ytimg.com/vi/_-DQyUfGWTY/mqdefault.jpg)






