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SPINAL CORD

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spinal cord & spinal nerves martini, anatomy & physiology, 9th edition, chapter # 13 lab manual, exercise # 19 page # 235 * * * * * alfonso a. pino. md. alfonso a ... – PowerPoint PPT presentation

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Title: SPINAL CORD


1
SPINAL CORD SPINAL NERVES
  • MARTINI, ANATOMY PHYSIOLOGY, 9TH EDITION,
    CHAPTER 13
  • LAB MANUAL, Exercise 19
  • Page 235

2
NOTE
  • THIS IS A STUDY GUIDE, NOT AN ALL INCLUSIVE
    REVIEW.
  • THERE MIGHT BE THINGS NOT COVERED BY THIS STUDY
    GUIDE THAT MIGHT BE ASKED IN YOUR PRACTICUMS /
  • QUIZZES.
  • STUDENTS ARE RESPONSIBLE FOR READING THEIR
    TEXBOOK (S) AND FOR ALL THE MATERIAL COVERED
    DURING THE LABORATORY PERIOD, AS PER THE COURSE
    SYLLABUS

3
Competency 6 The Nervous System
  • Upon successful completion of this laboratory,
    the students will be able to demonstrate an
    understanding of the structural and functional
    features of the nervous system including the
    special sense organs by
  • Describing the structure and functions of the
    spinal cord and the spinal nerves and their
    plexuses.

4
SPINAL MENINGES
  • Surrounds the spinal cord for physical stability

  • Shock absorption
  • Wall of vertebral canal (no part of meninges)
  • Epidural space- contains fat and blood vessels
  • imp for anesthetic
    injection
  • Dura mater- outermost covering of spinal cord
  • Subdural space
  • Aracnoid mater
  • Subarachnoid space- filled with CSF
  • CSF- shock absorber
  • diffusion medium for wastes,
    gases,

  • nutrients chemicals
  • Pia mater -piadelicate, matermother for
    nourishment

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SPINAL CORD
  • Dendicular ligaments- prevent lateral movement of
    the spinal cord

  • Conus medularis-
  • End part of the spinal cord, like a conus
  • Cauda equina- nerve fibers extending after
  • conus medularis, like
    a horse tail
  • Filum terminale- to anchor spinal cord
    vertically by connecting it with coccyx
  • F- to prevent up down movement
  • Gray matter- it has nuclei
  • Posterior (dorsal) horns somatic
    visceral sensory nuclei

  • Anterior (ventral) horns-somatic motor
    nuclei
  • Lateral horns- autonomic (visceral) nuclei

8
  • Grey commissure- to connect two sides of the
    grey mater
  • Central canal (the hole in the middle)-
  • Conteins
    CSF(cephalo spinal fluid)
  • White matter- it has tracs or fasciculus
  • Posterior (dorsal) white column
    (funiculus)

  • Carry sensory info
  • Lateral white column (funiculus)-

  • Carry sensory motor info
  • Anterior (ventral) white column
    (funiculus)

  • Carry sensory motor info
  • Anterior median fissure- deep groove
  • Posterior median sulcus- shallow groove

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15
SPINAL NERVES
  • Posterior root- carry sensory info
  • Posterior root ganglia- conteins sensory neurons

  • Anterior root- carries motor info
  • Posterior ramus (smaller)- carries sensory
    motor info


  • Anterior ramus- (thicker)- carries sensory
    motor info

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PLEXUSES
  • CERVICAL
  • BRACHIAL
  • LUMBAR
  • SACRAL

18
Peripheral Nerves and Plexuses
19
CERVICAL PLEXUS
  • Serves or innervates neck shoulder
  • Phrenic nerve- it extends below the shoulder to
    the

  • diaphragm.
  • It causes the diaphragm to contract

  • important for breathing

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  • Brachial plexus- serves or innervates upper limb
    and shoulder
  • Axillary n- serves deltoid teres
    minor
  • And
    skin of the shoulder

  • (From anterior to posterior)-
  • Radial nerve- serves posterior
    upper limb
  • Musculocutaneous n-serves anterior
    arm,

  • biceps brachii brachialis
  • Median n- serves anterior forearm
  • Ulnar n- serves anterior hand

22
Spinal Nerves and Plexuses
  • The Brachial Plexus of the Ventral Rami
  • Major nerves of brachial plexus
  • Musculocutaneous nerve (lateral cord)
  • Median nerve (lateral and medial cords)
  • Ulnar nerve (medial cord)
  • Axillary nerve (posterior cord)
  • Radial nerve (posterior cord)

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LUMBAR PLEXUS
  • It serves or innervates skin some muscles of
    anterior abdomen, buttocks, genitalia, anterior
    lateral posteromedial thigh medial surface of
    leg and foot
  • Femoral nerve anterior muscles of the
    thigh, flexors adductors of the hip, skin of
    the thigh(antero medial surface) skin over the
    medial surface of leg and foot
  • RECTUS FEMORIS
  • VASTUS MEDIALIS
  • VASTUS LATERALIS
  • VASTUS
    INTERMEDIUS

26
LUMBAR PLEXUS SACRAL PLEXUS
27
SACRAL PLEXUS
  • It serves or innervates buttock (gluteus)
  • posterior lower limb,
    anterior leg foot
  • lateral leg, some
    muscles of genitalia
  • including external anal
    and urethral sphincters
  • Sciatic n (thiker)- serves posterior thigh
  • Common peroneal n (goes anteriorly)- serves
    anterior leg foot
  • Tibial n (goes posteriorly)- serves posterior
    leg and foot

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Components of a Reflex Arch
32
The Patellar Reflex
33
REMEMBER!GO TO THE TUTORING ROOMAND PRACTICE
WITH MODELS.ROOM 3326.
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