Скачать или смотреть Master Typical Spinal Nerve | Upper Limb Lower Limb

Master Typical Spinal Nerve | Upper Limb Lower Limb

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▬▬▬▬▬▬▬▬▬▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
Spinal Cord Structural Overview (00:02:19 - 00:05:34)
Spinal Cord Regions:
Cervical (C1-C8)
Thoracic (T1-T12)
Lumbar (L1-L5)
Sacral
Coccygeal (single segment)
Segment Characteristics
Functional Definition:
One segment provides motor neurons to muscles from a specific myotome
Connects sensory input from a specific dermatome

Gray Matter Anatomy (00:06:25 - 00:09:15)
Gray Matter Horns
Posterior Horn:
Primarily sensory functions
Present throughout spinal cord
Anterior Horn:
Primarily motor functions
Extends throughout spinal cord
Lateral Horn:
Autonomic functions
Location Specifics:
Present only in thoracolumbar region (T1-L2)
Reappears in sacral segments (S2-S4)

Autonomic Nervous System Outflow
Sympathetic Outflow:
Originates from thoracolumbar region
Parasympathetic Outflow:
Craniosacral origin
Cranial nerves: 3rd, 7th, 9th, 10th
Sacral segments: S1-S4

Typical Spinal Nerve Structure (00:10:34 - 00:13:01)
Nerve Formation
Root Composition:
Anterior (Ventral) Root: Motor functions
Posterior (Dorsal) Root: Sensory functions
Nerve Branches
Typical Spinal Nerve:
Short segment (1-2 cm)
Formed by fusion of anterior and posterior roots
Divides into:
Posterior Ramus
Anterior Ramus
Special Anatomical Exception
C1 Segment:
Unique configuration
Contains only motor (anterior) root
Neurological Connectivity
Roots emerge laterally through intervertebral foramina
Fusion creates typical spinal nerve
Nerve branches supply different body regions
Advanced Conceptual Understanding
Segmental Specificity: Each spinal segment has precise motor and sensory territories
Neurological Precision: Nerve roots maintain specific functional characteristics
Autonomic Integration: Lateral horns facilitate sympathetic and parasympathetic functions
Clinical Implications
Understanding segmental anatomy crucial for:
Neurological diagnosis
Localization of neurological lesions
Understanding nerve root pathologies
Spinal Nerve Anatomy and Composition

Spinal Segments Overview (00:14:38 to 00:15:02)
Total of 31 spinal segments
Breakdown of segments:
8 Cervical
12 Thoracic
5 Lumbar
5 Sacral
1 Coccygeal
Unique Characteristic: 31 pairs of spinal nerves emerge, one pair per segment

Root Composition (00:16:21 to 00:17:51)
Anterior (Ventral) Root
Alternative Names:
Interior root
Motor root
Ventral root

Fiber Types (00:18:29 to 00:19:29)
Somatic Motor Fibers (Red)
Target skeletal muscles
Autonomic Motor Fibers (Green)
Target glands
Sympathetic or parasympathetic depending on spinal segment

Neuronal Components (00:19:29 to 00:21:09)

Unique Cervical Segment Characteristic (00:15:16 to 00:16:04)

Nerve Distribution Patterns (00:26:31 to 00:28:05)

Nerve Pathway Routing (00:23:41 to 00:24:32)

Spinal Nerve Composition (00:28:26 - 00:30:30)

Nerve Branching Mechanism (00:30:42 - 00:31:49)

Motor Neuron Classification (00:32:43 - 00:34:17)

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